/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-15 01:04:26,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-15 01:04:26,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-15 01:04:26,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-15 01:04:26,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-15 01:04:26,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-15 01:04:26,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-15 01:04:26,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-15 01:04:26,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-15 01:04:26,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-15 01:04:26,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-15 01:04:26,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-15 01:04:26,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-15 01:04:26,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-15 01:04:26,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-15 01:04:26,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-15 01:04:26,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-15 01:04:26,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-15 01:04:26,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-15 01:04:26,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-15 01:04:26,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-15 01:04:26,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-15 01:04:26,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-15 01:04:26,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-15 01:04:26,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-15 01:04:26,876 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-15 01:04:26,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-15 01:04:26,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-15 01:04:26,881 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-15 01:04:26,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-15 01:04:26,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-15 01:04:26,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-15 01:04:26,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-15 01:04:26,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-15 01:04:26,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-15 01:04:26,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-15 01:04:26,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-15 01:04:26,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-15 01:04:26,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-15 01:04:26,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-15 01:04:26,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-15 01:04:26,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-15 01:04:26,951 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-15 01:04:26,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-15 01:04:26,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-15 01:04:26,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-15 01:04:26,954 INFO L138 SettingsManager]: * Use SBE=true [2020-09-15 01:04:26,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-15 01:04:26,955 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-15 01:04:26,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-15 01:04:26,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-15 01:04:26,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-15 01:04:26,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-15 01:04:26,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-15 01:04:26,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-15 01:04:26,957 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-15 01:04:26,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-15 01:04:26,958 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-15 01:04:26,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-15 01:04:26,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-15 01:04:26,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-15 01:04:26,959 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-15 01:04:26,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-15 01:04:26,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 01:04:26,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-15 01:04:26,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-15 01:04:26,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-15 01:04:26,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-15 01:04:26,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-15 01:04:26,960 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-15 01:04:26,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-15 01:04:28,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-15 01:04:28,164 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-15 01:04:28,169 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-15 01:04:28,171 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-15 01:04:28,171 INFO L275 PluginConnector]: CDTParser initialized [2020-09-15 01:04:28,172 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-09-15 01:04:28,258 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3309563b7/f350d67cd9b44776bcd0afedd6167994/FLAG3b294181f [2020-09-15 01:04:28,882 INFO L306 CDTParser]: Found 1 translation units. [2020-09-15 01:04:28,883 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-09-15 01:04:28,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3309563b7/f350d67cd9b44776bcd0afedd6167994/FLAG3b294181f [2020-09-15 01:04:29,164 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3309563b7/f350d67cd9b44776bcd0afedd6167994 [2020-09-15 01:04:29,180 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-15 01:04:29,187 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-15 01:04:29,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-15 01:04:29,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-15 01:04:29,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-15 01:04:29,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:04:29" (1/1) ... [2020-09-15 01:04:29,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ea91c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:29, skipping insertion in model container [2020-09-15 01:04:29,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:04:29" (1/1) ... [2020-09-15 01:04:29,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-15 01:04:29,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-15 01:04:29,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 01:04:29,866 INFO L203 MainTranslator]: Completed pre-run [2020-09-15 01:04:29,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 01:04:30,006 INFO L208 MainTranslator]: Completed translation [2020-09-15 01:04:30,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30 WrapperNode [2020-09-15 01:04:30,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-15 01:04:30,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-15 01:04:30,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-15 01:04:30,011 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-15 01:04:30,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... [2020-09-15 01:04:30,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... [2020-09-15 01:04:30,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-15 01:04:30,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-15 01:04:30,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-15 01:04:30,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-15 01:04:30,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... [2020-09-15 01:04:30,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... [2020-09-15 01:04:30,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... [2020-09-15 01:04:30,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... [2020-09-15 01:04:30,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... [2020-09-15 01:04:30,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... [2020-09-15 01:04:30,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... [2020-09-15 01:04:30,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-15 01:04:30,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-15 01:04:30,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-15 01:04:30,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-15 01:04:30,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 01:04:30,203 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-15 01:04:30,204 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-15 01:04:30,204 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-15 01:04:30,204 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-15 01:04:30,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-15 01:04:30,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-15 01:04:30,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-15 01:04:30,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-15 01:04:30,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-15 01:04:30,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-15 01:04:30,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-15 01:04:30,207 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-15 01:04:30,590 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-15 01:04:30,590 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-15 01:04:30,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:04:30 BoogieIcfgContainer [2020-09-15 01:04:30,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-15 01:04:30,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-15 01:04:30,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-15 01:04:30,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-15 01:04:30,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 01:04:29" (1/3) ... [2020-09-15 01:04:30,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb59619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:04:30, skipping insertion in model container [2020-09-15 01:04:30,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (2/3) ... [2020-09-15 01:04:30,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb59619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:04:30, skipping insertion in model container [2020-09-15 01:04:30,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:04:30" (3/3) ... [2020-09-15 01:04:30,605 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-09-15 01:04:30,617 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-15 01:04:30,617 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-15 01:04:30,628 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-15 01:04:30,629 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-15 01:04:30,661 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,662 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,662 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,662 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,663 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,665 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,666 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,666 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,666 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,666 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,669 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,669 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,670 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,670 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,670 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,671 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,671 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,671 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,672 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,672 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,672 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,673 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,673 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,674 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,674 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,674 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,675 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,675 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,675 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,676 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,682 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,682 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,683 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,683 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,683 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,683 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,690 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,690 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,691 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,691 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,691 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,691 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,713 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-15 01:04:30,737 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-15 01:04:30,737 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-15 01:04:30,737 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-15 01:04:30,737 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-15 01:04:30,737 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-15 01:04:30,738 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-15 01:04:30,738 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-15 01:04:30,738 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-15 01:04:30,753 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-09-15 01:04:30,756 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-15 01:04:30,802 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-15 01:04:30,802 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 01:04:30,813 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-09-15 01:04:30,816 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-15 01:04:30,836 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-15 01:04:30,837 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 01:04:30,838 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-09-15 01:04:30,840 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-09-15 01:04:30,842 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-15 01:04:32,023 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-09-15 01:04:32,115 INFO L206 etLargeBlockEncoding]: Checked pairs total: 988 [2020-09-15 01:04:32,116 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-09-15 01:04:32,121 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-15 01:04:32,135 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-15 01:04:32,139 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-15 01:04:32,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-15 01:04:32,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:32,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-15 01:04:32,150 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:32,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:32,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-09-15 01:04:32,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:32,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693461129] [2020-09-15 01:04:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:32,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693461129] [2020-09-15 01:04:32,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:04:32,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-15 01:04:32,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967035667] [2020-09-15 01:04:32,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-15 01:04:32,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:32,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-15 01:04:32,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-15 01:04:32,478 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-15 01:04:32,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:32,554 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-09-15 01:04:32,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-15 01:04:32,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-15 01:04:32,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:32,572 INFO L225 Difference]: With dead ends: 83 [2020-09-15 01:04:32,573 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 01:04:32,575 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 [2020-09-15 01:04:32,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 01:04:32,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-15 01:04:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:04:32,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-09-15 01:04:32,631 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-09-15 01:04:32,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:32,632 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-09-15 01:04:32,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-15 01:04:32,632 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-09-15 01:04:32,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-15 01:04:32,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:32,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:32,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-15 01:04:32,634 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:32,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:32,634 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-09-15 01:04:32,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:32,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126811895] [2020-09-15 01:04:32,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:32,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126811895] [2020-09-15 01:04:32,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:04:32,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 01:04:32,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815410464] [2020-09-15 01:04:32,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 01:04:32,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:32,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 01:04:32,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 01:04:32,867 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-09-15 01:04:32,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:32,961 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-09-15 01:04:32,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 01:04:32,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-15 01:04:32,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:32,964 INFO L225 Difference]: With dead ends: 80 [2020-09-15 01:04:32,964 INFO L226 Difference]: Without dead ends: 75 [2020-09-15 01:04:32,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 01:04:32,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-15 01:04:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-09-15 01:04:32,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-15 01:04:32,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-15 01:04:32,976 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-09-15 01:04:32,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:32,978 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-15 01:04:32,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 01:04:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-15 01:04:32,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-15 01:04:32,979 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:32,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:32,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-15 01:04:32,980 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:32,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:32,980 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-09-15 01:04:32,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:32,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238361540] [2020-09-15 01:04:32,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:33,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238361540] [2020-09-15 01:04:33,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:04:33,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 01:04:33,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26840373] [2020-09-15 01:04:33,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 01:04:33,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:33,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 01:04:33,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-15 01:04:33,068 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-09-15 01:04:33,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:33,101 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-09-15 01:04:33,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-15 01:04:33,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-15 01:04:33,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:33,104 INFO L225 Difference]: With dead ends: 73 [2020-09-15 01:04:33,104 INFO L226 Difference]: Without dead ends: 70 [2020-09-15 01:04:33,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-15 01:04:33,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-15 01:04:33,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-15 01:04:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 01:04:33,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-09-15 01:04:33,115 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-09-15 01:04:33,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:33,115 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-09-15 01:04:33,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 01:04:33,116 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-09-15 01:04:33,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-15 01:04:33,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:33,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:33,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-15 01:04:33,117 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:33,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:33,118 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-09-15 01:04:33,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:33,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240787059] [2020-09-15 01:04:33,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:33,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240787059] [2020-09-15 01:04:33,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:04:33,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 01:04:33,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033864029] [2020-09-15 01:04:33,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 01:04:33,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:33,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 01:04:33,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 01:04:33,196 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-09-15 01:04:33,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:33,284 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-09-15 01:04:33,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 01:04:33,286 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-15 01:04:33,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:33,288 INFO L225 Difference]: With dead ends: 86 [2020-09-15 01:04:33,288 INFO L226 Difference]: Without dead ends: 80 [2020-09-15 01:04:33,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 01:04:33,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-15 01:04:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-09-15 01:04:33,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 01:04:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-09-15 01:04:33,307 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-09-15 01:04:33,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:33,308 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-09-15 01:04:33,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 01:04:33,308 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-09-15 01:04:33,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-15 01:04:33,309 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:33,309 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:33,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-15 01:04:33,311 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:33,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:33,311 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-09-15 01:04:33,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:33,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437234914] [2020-09-15 01:04:33,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:33,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437234914] [2020-09-15 01:04:33,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543285611] [2020-09-15 01:04:33,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:33,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:33,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:33,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:04:33,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:33,558 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:04:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:33,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:33,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-09-15 01:04:33,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400376427] [2020-09-15 01:04:33,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:04:33,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:33,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:04:33,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:04:33,589 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-09-15 01:04:33,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:33,685 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-09-15 01:04:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:04:33,685 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-09-15 01:04:33,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:33,687 INFO L225 Difference]: With dead ends: 101 [2020-09-15 01:04:33,687 INFO L226 Difference]: Without dead ends: 96 [2020-09-15 01:04:33,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:33,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-15 01:04:33,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-09-15 01:04:33,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-15 01:04:33,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-09-15 01:04:33,697 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-09-15 01:04:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:33,697 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-09-15 01:04:33,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:04:33,698 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-09-15 01:04:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-15 01:04:33,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:33,699 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:33,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:33,915 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:33,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:33,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-09-15 01:04:33,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:33,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000570987] [2020-09-15 01:04:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:34,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000570987] [2020-09-15 01:04:34,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104034610] [2020-09-15 01:04:34,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:34,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:04:34,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:34,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:04:34,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:34,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:34,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-15 01:04:34,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865149014] [2020-09-15 01:04:34,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:04:34,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:34,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:04:34,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:04:34,146 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-09-15 01:04:34,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:34,210 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-15 01:04:34,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 01:04:34,211 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-15 01:04:34,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:34,212 INFO L225 Difference]: With dead ends: 88 [2020-09-15 01:04:34,212 INFO L226 Difference]: Without dead ends: 85 [2020-09-15 01:04:34,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:04:34,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-15 01:04:34,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2020-09-15 01:04:34,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 01:04:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 183 transitions. [2020-09-15 01:04:34,221 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 183 transitions. Word has length 9 [2020-09-15 01:04:34,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:34,221 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 183 transitions. [2020-09-15 01:04:34,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:04:34,222 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 183 transitions. [2020-09-15 01:04:34,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-15 01:04:34,223 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:34,223 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:34,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:34,437 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:34,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:34,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-09-15 01:04:34,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:34,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909022742] [2020-09-15 01:04:34,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:34,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:34,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909022742] [2020-09-15 01:04:34,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648623726] [2020-09-15 01:04:34,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:34,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:04:34,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:34,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:04:34,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:34,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:34,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-15 01:04:34,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198719818] [2020-09-15 01:04:34,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:04:34,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:34,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:04:34,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:04:34,648 INFO L87 Difference]: Start difference. First operand 76 states and 183 transitions. Second operand 9 states. [2020-09-15 01:04:34,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:34,727 INFO L93 Difference]: Finished difference Result 94 states and 221 transitions. [2020-09-15 01:04:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:04:34,728 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-15 01:04:34,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:34,729 INFO L225 Difference]: With dead ends: 94 [2020-09-15 01:04:34,729 INFO L226 Difference]: Without dead ends: 91 [2020-09-15 01:04:34,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:04:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-15 01:04:34,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 78. [2020-09-15 01:04:34,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 01:04:34,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 190 transitions. [2020-09-15 01:04:34,751 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 190 transitions. Word has length 9 [2020-09-15 01:04:34,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:34,751 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 190 transitions. [2020-09-15 01:04:34,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:04:34,752 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 190 transitions. [2020-09-15 01:04:34,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-15 01:04:34,752 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:34,753 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:34,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:34,954 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:34,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:34,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-09-15 01:04:34,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:34,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272679799] [2020-09-15 01:04:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:35,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272679799] [2020-09-15 01:04:35,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295195181] [2020-09-15 01:04:35,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:35,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:35,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:35,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:04:35,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:35,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:04:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:35,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:35,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-15 01:04:35,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974233029] [2020-09-15 01:04:35,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:04:35,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:35,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:04:35,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:04:35,224 INFO L87 Difference]: Start difference. First operand 78 states and 190 transitions. Second operand 9 states. [2020-09-15 01:04:35,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:35,409 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-15 01:04:35,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:04:35,410 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-15 01:04:35,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:35,411 INFO L225 Difference]: With dead ends: 103 [2020-09-15 01:04:35,411 INFO L226 Difference]: Without dead ends: 97 [2020-09-15 01:04:35,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:04:35,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-15 01:04:35,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2020-09-15 01:04:35,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-15 01:04:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-09-15 01:04:35,424 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 9 [2020-09-15 01:04:35,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:35,428 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-09-15 01:04:35,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:04:35,428 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-09-15 01:04:35,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:04:35,429 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:35,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:35,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:35,643 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:35,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:35,643 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 1 times [2020-09-15 01:04:35,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:35,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612452628] [2020-09-15 01:04:35,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:35,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612452628] [2020-09-15 01:04:35,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:04:35,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 01:04:35,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204239411] [2020-09-15 01:04:35,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 01:04:35,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:35,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 01:04:35,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:04:35,742 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-09-15 01:04:35,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:35,803 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-09-15 01:04:35,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 01:04:35,804 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-15 01:04:35,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:35,805 INFO L225 Difference]: With dead ends: 100 [2020-09-15 01:04:35,805 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:04:35,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 01:04:35,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:04:35,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-09-15 01:04:35,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-15 01:04:35,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-09-15 01:04:35,812 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-09-15 01:04:35,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:35,812 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-09-15 01:04:35,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 01:04:35,813 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-09-15 01:04:35,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:04:35,814 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:35,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:35,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-15 01:04:35,814 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:35,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:35,815 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 2 times [2020-09-15 01:04:35,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:35,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064100938] [2020-09-15 01:04:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:35,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064100938] [2020-09-15 01:04:35,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:04:35,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 01:04:35,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233178792] [2020-09-15 01:04:35,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 01:04:35,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:35,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 01:04:35,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:04:35,887 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-09-15 01:04:35,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:35,975 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-15 01:04:35,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:04:35,975 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-15 01:04:35,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:35,976 INFO L225 Difference]: With dead ends: 105 [2020-09-15 01:04:35,977 INFO L226 Difference]: Without dead ends: 100 [2020-09-15 01:04:35,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:04:35,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-15 01:04:35,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-15 01:04:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:04:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-09-15 01:04:35,983 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-09-15 01:04:35,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:35,983 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-09-15 01:04:35,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 01:04:35,984 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-09-15 01:04:35,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:04:35,984 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:35,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:35,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-15 01:04:35,985 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:35,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:35,986 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 3 times [2020-09-15 01:04:35,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:35,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965471452] [2020-09-15 01:04:35,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:36,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965471452] [2020-09-15 01:04:36,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:04:36,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 01:04:36,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694317363] [2020-09-15 01:04:36,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 01:04:36,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:36,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 01:04:36,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:04:36,066 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-09-15 01:04:36,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:36,157 INFO L93 Difference]: Finished difference Result 105 states and 248 transitions. [2020-09-15 01:04:36,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:04:36,158 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-15 01:04:36,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:36,159 INFO L225 Difference]: With dead ends: 105 [2020-09-15 01:04:36,160 INFO L226 Difference]: Without dead ends: 100 [2020-09-15 01:04:36,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:04:36,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-15 01:04:36,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-15 01:04:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:04:36,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-09-15 01:04:36,165 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-09-15 01:04:36,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:36,166 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-09-15 01:04:36,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 01:04:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-09-15 01:04:36,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:04:36,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:36,167 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:36,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-15 01:04:36,167 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:36,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:36,168 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-09-15 01:04:36,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:36,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541617670] [2020-09-15 01:04:36,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:36,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:36,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541617670] [2020-09-15 01:04:36,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758014629] [2020-09-15 01:04:36,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:36,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:04:36,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:36,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:36,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:36,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:04:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:36,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:36,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 01:04:36,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644328204] [2020-09-15 01:04:36,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:04:36,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:36,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:04:36,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:04:36,463 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-09-15 01:04:36,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:36,561 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-09-15 01:04:36,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:04:36,561 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-09-15 01:04:36,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:36,563 INFO L225 Difference]: With dead ends: 122 [2020-09-15 01:04:36,563 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 01:04:36,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:04:36,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 01:04:36,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-09-15 01:04:36,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 01:04:36,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-09-15 01:04:36,569 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-09-15 01:04:36,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:36,569 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-09-15 01:04:36,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:04:36,570 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-09-15 01:04:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:04:36,571 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:36,571 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:36,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-15 01:04:36,784 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:36,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:36,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-09-15 01:04:36,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:36,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688546919] [2020-09-15 01:04:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:36,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688546919] [2020-09-15 01:04:36,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964556197] [2020-09-15 01:04:36,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:36,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:04:36,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:36,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:36,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:37,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:37,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:37,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814132990] [2020-09-15 01:04:37,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:37,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:37,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:37,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:37,054 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-09-15 01:04:37,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:37,182 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-15 01:04:37,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:04:37,183 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-15 01:04:37,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:37,184 INFO L225 Difference]: With dead ends: 108 [2020-09-15 01:04:37,184 INFO L226 Difference]: Without dead ends: 105 [2020-09-15 01:04:37,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:04:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-15 01:04:37,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-09-15 01:04:37,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-15 01:04:37,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-09-15 01:04:37,189 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-09-15 01:04:37,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:37,190 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-09-15 01:04:37,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:37,190 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-09-15 01:04:37,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:04:37,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:37,191 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:37,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:37,401 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:37,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:37,402 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-09-15 01:04:37,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:37,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073210656] [2020-09-15 01:04:37,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:37,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073210656] [2020-09-15 01:04:37,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737963373] [2020-09-15 01:04:37,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:37,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:37,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:37,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:37,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:37,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651848258] [2020-09-15 01:04:37,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:37,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:37,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:37,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:37,645 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-09-15 01:04:37,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:37,783 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-09-15 01:04:37,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:04:37,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-15 01:04:37,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:37,786 INFO L225 Difference]: With dead ends: 116 [2020-09-15 01:04:37,786 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 01:04:37,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:04:37,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 01:04:37,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-09-15 01:04:37,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:04:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-09-15 01:04:37,791 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-09-15 01:04:37,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:37,792 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-09-15 01:04:37,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:37,792 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-09-15 01:04:37,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:04:37,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:37,793 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:38,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-15 01:04:38,004 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:38,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:38,005 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-09-15 01:04:38,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:38,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073659669] [2020-09-15 01:04:38,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:38,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073659669] [2020-09-15 01:04:38,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323320408] [2020-09-15 01:04:38,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:38,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:38,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:38,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:38,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:38,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:38,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:38,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877488511] [2020-09-15 01:04:38,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:38,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:38,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:38,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:38,306 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-09-15 01:04:38,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:38,454 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-09-15 01:04:38,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:04:38,455 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-15 01:04:38,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:38,457 INFO L225 Difference]: With dead ends: 115 [2020-09-15 01:04:38,461 INFO L226 Difference]: Without dead ends: 112 [2020-09-15 01:04:38,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:04:38,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-15 01:04:38,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-09-15 01:04:38,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 01:04:38,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-09-15 01:04:38,471 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-09-15 01:04:38,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:38,472 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-09-15 01:04:38,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:38,472 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-09-15 01:04:38,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:04:38,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:38,473 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:38,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-15 01:04:38,688 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:38,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:38,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-09-15 01:04:38,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:38,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233724286] [2020-09-15 01:04:38,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:38,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233724286] [2020-09-15 01:04:38,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458234804] [2020-09-15 01:04:38,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:38,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:04:38,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:38,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:38,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:38,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:04:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:38,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:38,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:38,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983691548] [2020-09-15 01:04:38,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:38,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:38,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:38,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:38,908 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-09-15 01:04:39,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:39,128 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-09-15 01:04:39,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:04:39,129 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-15 01:04:39,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:39,130 INFO L225 Difference]: With dead ends: 124 [2020-09-15 01:04:39,130 INFO L226 Difference]: Without dead ends: 118 [2020-09-15 01:04:39,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:04:39,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-15 01:04:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-09-15 01:04:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 01:04:39,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-09-15 01:04:39,135 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-09-15 01:04:39,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:39,136 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-09-15 01:04:39,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:39,136 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-09-15 01:04:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:39,137 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:39,137 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:39,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-15 01:04:39,350 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:39,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:39,351 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 4 times [2020-09-15 01:04:39,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:39,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222684576] [2020-09-15 01:04:39,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:39,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222684576] [2020-09-15 01:04:39,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992429650] [2020-09-15 01:04:39,425 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 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 [2020-09-15 01:04:39,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:04:39,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:39,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:39,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:39,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:39,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:39,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666059158] [2020-09-15 01:04:39,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:39,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:39,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:39,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:39,580 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-09-15 01:04:39,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:39,637 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-09-15 01:04:39,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 01:04:39,637 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:39,639 INFO L225 Difference]: With dead ends: 113 [2020-09-15 01:04:39,639 INFO L226 Difference]: Without dead ends: 111 [2020-09-15 01:04:39,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:39,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-15 01:04:39,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-09-15 01:04:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-15 01:04:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-09-15 01:04:39,643 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-09-15 01:04:39,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:39,644 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-09-15 01:04:39,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:39,644 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-09-15 01:04:39,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:39,645 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:39,645 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:39,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-15 01:04:39,855 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:39,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:39,856 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 5 times [2020-09-15 01:04:39,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:39,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151930927] [2020-09-15 01:04:39,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:39,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151930927] [2020-09-15 01:04:39,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326780537] [2020-09-15 01:04:39,927 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 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 [2020-09-15 01:04:39,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:39,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:39,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:39,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:40,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:40,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:40,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091735806] [2020-09-15 01:04:40,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:40,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:40,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:40,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:40,050 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-09-15 01:04:40,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:40,111 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-09-15 01:04:40,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:04:40,112 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:40,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:40,114 INFO L225 Difference]: With dead ends: 118 [2020-09-15 01:04:40,114 INFO L226 Difference]: Without dead ends: 116 [2020-09-15 01:04:40,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:04:40,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-15 01:04:40,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-09-15 01:04:40,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-15 01:04:40,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-09-15 01:04:40,119 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-09-15 01:04:40,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:40,119 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-09-15 01:04:40,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:40,119 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-09-15 01:04:40,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:40,120 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:40,120 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:40,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-15 01:04:40,323 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:40,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:40,324 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 6 times [2020-09-15 01:04:40,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:40,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437603380] [2020-09-15 01:04:40,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:40,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437603380] [2020-09-15 01:04:40,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448416706] [2020-09-15 01:04:40,397 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 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 [2020-09-15 01:04:40,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:04:40,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:40,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:40,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:40,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:40,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:40,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998548207] [2020-09-15 01:04:40,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:40,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:40,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:40,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:40,520 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-09-15 01:04:40,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:40,661 INFO L93 Difference]: Finished difference Result 117 states and 278 transitions. [2020-09-15 01:04:40,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:04:40,662 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:40,663 INFO L225 Difference]: With dead ends: 117 [2020-09-15 01:04:40,663 INFO L226 Difference]: Without dead ends: 115 [2020-09-15 01:04:40,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:04:40,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-15 01:04:40,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 98. [2020-09-15 01:04:40,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:04:40,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-09-15 01:04:40,668 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-09-15 01:04:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:40,668 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-09-15 01:04:40,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:40,668 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-09-15 01:04:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:40,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:40,669 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:40,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:40,879 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:40,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:40,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 7 times [2020-09-15 01:04:40,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:40,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331990255] [2020-09-15 01:04:40,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:40,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331990255] [2020-09-15 01:04:40,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7463450] [2020-09-15 01:04:40,995 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 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 [2020-09-15 01:04:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:41,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:41,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:41,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:41,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:41,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747682678] [2020-09-15 01:04:41,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:41,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:41,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:41,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:41,138 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-09-15 01:04:41,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:41,218 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-09-15 01:04:41,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:04:41,235 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:41,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:41,236 INFO L225 Difference]: With dead ends: 122 [2020-09-15 01:04:41,236 INFO L226 Difference]: Without dead ends: 120 [2020-09-15 01:04:41,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:04:41,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-15 01:04:41,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-09-15 01:04:41,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-15 01:04:41,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-09-15 01:04:41,242 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-09-15 01:04:41,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:41,242 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-09-15 01:04:41,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:41,242 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-09-15 01:04:41,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:41,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:41,243 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:41,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-09-15 01:04:41,452 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:41,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:41,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 8 times [2020-09-15 01:04:41,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:41,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412150023] [2020-09-15 01:04:41,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:41,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412150023] [2020-09-15 01:04:41,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534994517] [2020-09-15 01:04:41,550 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 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 [2020-09-15 01:04:41,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:41,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:41,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:41,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:41,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:41,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:41,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916664498] [2020-09-15 01:04:41,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:41,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:41,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:41,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:41,703 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-09-15 01:04:41,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:41,798 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-09-15 01:04:41,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:04:41,799 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:41,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:41,800 INFO L225 Difference]: With dead ends: 123 [2020-09-15 01:04:41,800 INFO L226 Difference]: Without dead ends: 121 [2020-09-15 01:04:41,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:41,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-15 01:04:41,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-09-15 01:04:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:04:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-09-15 01:04:41,804 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-09-15 01:04:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:41,805 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-09-15 01:04:41,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-09-15 01:04:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:41,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:41,806 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:42,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:42,017 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:42,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:42,017 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 9 times [2020-09-15 01:04:42,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:42,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212351293] [2020-09-15 01:04:42,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:42,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212351293] [2020-09-15 01:04:42,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941203888] [2020-09-15 01:04:42,133 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 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 [2020-09-15 01:04:42,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:04:42,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:42,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:42,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:42,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:42,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:42,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662405514] [2020-09-15 01:04:42,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:42,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:42,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:42,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:42,326 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-09-15 01:04:42,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:42,437 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-15 01:04:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:04:42,438 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:42,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:42,438 INFO L225 Difference]: With dead ends: 123 [2020-09-15 01:04:42,438 INFO L226 Difference]: Without dead ends: 121 [2020-09-15 01:04:42,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:42,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-15 01:04:42,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-09-15 01:04:42,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-15 01:04:42,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-09-15 01:04:42,442 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-09-15 01:04:42,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:42,443 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-09-15 01:04:42,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:42,443 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-09-15 01:04:42,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:42,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:42,444 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:42,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-15 01:04:42,652 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:42,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:42,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 10 times [2020-09-15 01:04:42,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:42,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784940944] [2020-09-15 01:04:42,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:42,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784940944] [2020-09-15 01:04:42,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010621681] [2020-09-15 01:04:42,720 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 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 [2020-09-15 01:04:42,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:04:42,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:42,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:42,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:42,858 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:04:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:42,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:42,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:42,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463652576] [2020-09-15 01:04:42,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:42,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:42,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:42,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:42,914 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-09-15 01:04:43,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:43,168 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-09-15 01:04:43,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:04:43,168 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:43,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:43,169 INFO L225 Difference]: With dead ends: 133 [2020-09-15 01:04:43,170 INFO L226 Difference]: Without dead ends: 128 [2020-09-15 01:04:43,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:04:43,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-15 01:04:43,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-09-15 01:04:43,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-15 01:04:43,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-09-15 01:04:43,174 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-09-15 01:04:43,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:43,175 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-09-15 01:04:43,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:43,175 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-09-15 01:04:43,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:43,176 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:43,176 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:43,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:43,388 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:43,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:43,388 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 11 times [2020-09-15 01:04:43,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:43,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361127077] [2020-09-15 01:04:43,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:43,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361127077] [2020-09-15 01:04:43,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375551221] [2020-09-15 01:04:43,459 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 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 [2020-09-15 01:04:43,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:43,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:43,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:43,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:43,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:43,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:43,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6875794] [2020-09-15 01:04:43,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:43,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:43,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:43,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:43,600 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-09-15 01:04:43,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:43,759 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-09-15 01:04:43,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:04:43,760 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:43,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:43,761 INFO L225 Difference]: With dead ends: 127 [2020-09-15 01:04:43,761 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 01:04:43,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:04:43,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 01:04:43,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-09-15 01:04:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:04:43,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-15 01:04:43,766 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-15 01:04:43,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:43,766 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-15 01:04:43,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:43,766 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-15 01:04:43,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:43,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:43,767 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:43,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-15 01:04:43,977 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:43,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:43,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 12 times [2020-09-15 01:04:43,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:43,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528693153] [2020-09-15 01:04:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:44,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528693153] [2020-09-15 01:04:44,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994457778] [2020-09-15 01:04:44,044 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 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 [2020-09-15 01:04:44,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:04:44,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:44,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:44,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:44,160 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:04:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:44,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:44,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:44,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891046511] [2020-09-15 01:04:44,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:44,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:44,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:44,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:44,176 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-15 01:04:44,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:44,452 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-09-15 01:04:44,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:04:44,452 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:44,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:44,454 INFO L225 Difference]: With dead ends: 141 [2020-09-15 01:04:44,454 INFO L226 Difference]: Without dead ends: 136 [2020-09-15 01:04:44,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:04:44,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-15 01:04:44,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-09-15 01:04:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:04:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-15 01:04:44,460 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-15 01:04:44,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:44,460 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-15 01:04:44,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:44,461 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-15 01:04:44,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:44,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:44,461 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:44,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-15 01:04:44,673 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:44,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:44,674 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 13 times [2020-09-15 01:04:44,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:44,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123893644] [2020-09-15 01:04:44,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:44,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:44,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123893644] [2020-09-15 01:04:44,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962531364] [2020-09-15 01:04:44,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-15 01:04:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:44,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:44,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:44,864 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:04:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:44,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:44,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:44,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420152123] [2020-09-15 01:04:44,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:44,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:44,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:44,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:44,875 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-15 01:04:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:45,087 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-09-15 01:04:45,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:04:45,087 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:45,089 INFO L225 Difference]: With dead ends: 136 [2020-09-15 01:04:45,089 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:04:45,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:04:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:04:45,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-15 01:04:45,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-15 01:04:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-09-15 01:04:45,093 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-09-15 01:04:45,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:45,094 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-09-15 01:04:45,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:45,094 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-09-15 01:04:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:45,094 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:45,095 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:45,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-15 01:04:45,305 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:45,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:45,306 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 14 times [2020-09-15 01:04:45,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:45,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084707083] [2020-09-15 01:04:45,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:45,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084707083] [2020-09-15 01:04:45,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159527225] [2020-09-15 01:04:45,402 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 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 [2020-09-15 01:04:45,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:45,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:45,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:45,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:45,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:45,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:45,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823673436] [2020-09-15 01:04:45,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:45,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:45,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:45,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:45,535 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-09-15 01:04:45,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:45,692 INFO L93 Difference]: Finished difference Result 128 states and 297 transitions. [2020-09-15 01:04:45,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:04:45,697 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:45,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:45,698 INFO L225 Difference]: With dead ends: 128 [2020-09-15 01:04:45,698 INFO L226 Difference]: Without dead ends: 126 [2020-09-15 01:04:45,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:04:45,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-15 01:04:45,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2020-09-15 01:04:45,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:04:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-15 01:04:45,702 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-15 01:04:45,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:45,703 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-15 01:04:45,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-15 01:04:45,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:45,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:45,704 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:45,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-09-15 01:04:45,914 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:45,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:45,915 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 15 times [2020-09-15 01:04:45,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:45,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897328090] [2020-09-15 01:04:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:45,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897328090] [2020-09-15 01:04:45,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851244688] [2020-09-15 01:04:45,980 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 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 [2020-09-15 01:04:46,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:04:46,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:46,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:46,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:46,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:46,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:46,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160286324] [2020-09-15 01:04:46,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:46,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:46,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:46,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:46,103 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-15 01:04:46,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:46,355 INFO L93 Difference]: Finished difference Result 126 states and 293 transitions. [2020-09-15 01:04:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:04:46,356 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:46,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:46,357 INFO L225 Difference]: With dead ends: 126 [2020-09-15 01:04:46,357 INFO L226 Difference]: Without dead ends: 124 [2020-09-15 01:04:46,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:04:46,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-15 01:04:46,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 101. [2020-09-15 01:04:46,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-15 01:04:46,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-15 01:04:46,361 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-15 01:04:46,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:46,361 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-15 01:04:46,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:46,361 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-15 01:04:46,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:46,362 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:46,362 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:46,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-15 01:04:46,572 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:46,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:46,573 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 16 times [2020-09-15 01:04:46,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:46,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036862065] [2020-09-15 01:04:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:46,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036862065] [2020-09-15 01:04:46,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709190703] [2020-09-15 01:04:46,643 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 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 [2020-09-15 01:04:46,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:04:46,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:46,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:46,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:46,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:04:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:46,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:46,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:46,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423874571] [2020-09-15 01:04:46,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:46,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:46,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:46,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:46,770 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-15 01:04:47,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:47,066 INFO L93 Difference]: Finished difference Result 136 states and 323 transitions. [2020-09-15 01:04:47,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:04:47,067 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:47,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:47,068 INFO L225 Difference]: With dead ends: 136 [2020-09-15 01:04:47,068 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:04:47,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:04:47,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:04:47,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-15 01:04:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-15 01:04:47,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-15 01:04:47,073 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-15 01:04:47,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:47,073 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-15 01:04:47,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:47,074 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-15 01:04:47,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:47,074 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:47,074 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:47,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:47,287 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:47,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:47,287 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 17 times [2020-09-15 01:04:47,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:47,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887821045] [2020-09-15 01:04:47,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:47,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887821045] [2020-09-15 01:04:47,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534003349] [2020-09-15 01:04:47,370 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 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 [2020-09-15 01:04:47,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:47,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:47,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:47,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:47,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:04:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:47,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:47,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:47,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370726995] [2020-09-15 01:04:47,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:47,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:47,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:47,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:47,522 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-15 01:04:47,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:47,885 INFO L93 Difference]: Finished difference Result 138 states and 325 transitions. [2020-09-15 01:04:47,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:04:47,886 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:47,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:47,887 INFO L225 Difference]: With dead ends: 138 [2020-09-15 01:04:47,888 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 01:04:47,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:04:47,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 01:04:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 99. [2020-09-15 01:04:47,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:04:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-15 01:04:47,892 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-15 01:04:47,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:47,893 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-15 01:04:47,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:47,893 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-15 01:04:47,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:47,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:47,894 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:48,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:48,104 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:48,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:48,105 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 18 times [2020-09-15 01:04:48,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:48,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629174554] [2020-09-15 01:04:48,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:48,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629174554] [2020-09-15 01:04:48,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702582589] [2020-09-15 01:04:48,171 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 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 [2020-09-15 01:04:48,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:04:48,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:48,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:48,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:48,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:04:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:48,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:48,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:48,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636491758] [2020-09-15 01:04:48,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:48,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:48,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:48,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:48,296 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-15 01:04:48,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:48,565 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-09-15 01:04:48,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:04:48,565 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:48,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:48,566 INFO L225 Difference]: With dead ends: 136 [2020-09-15 01:04:48,567 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:04:48,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:04:48,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:04:48,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 98. [2020-09-15 01:04:48,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:04:48,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-09-15 01:04:48,571 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-09-15 01:04:48,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:48,572 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-09-15 01:04:48,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:48,572 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-09-15 01:04:48,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:48,573 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:48,573 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:48,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:48,774 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:48,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:48,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-09-15 01:04:48,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:48,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983526001] [2020-09-15 01:04:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:48,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983526001] [2020-09-15 01:04:48,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717290014] [2020-09-15 01:04:48,860 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 [2020-09-15 01:04:48,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:04:48,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:48,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:48,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:49,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:04:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:49,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:49,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-09-15 01:04:49,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532585461] [2020-09-15 01:04:49,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:04:49,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:49,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:04:49,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:04:49,043 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-09-15 01:04:49,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:49,188 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-09-15 01:04:49,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:04:49,189 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-09-15 01:04:49,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:49,190 INFO L225 Difference]: With dead ends: 143 [2020-09-15 01:04:49,190 INFO L226 Difference]: Without dead ends: 138 [2020-09-15 01:04:49,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:04:49,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-15 01:04:49,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-09-15 01:04:49,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:04:49,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-09-15 01:04:49,194 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-09-15 01:04:49,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:49,195 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-09-15 01:04:49,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:04:49,195 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-09-15 01:04:49,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:49,195 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:49,195 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:49,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-15 01:04:49,396 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:49,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:49,397 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-09-15 01:04:49,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:49,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187629518] [2020-09-15 01:04:49,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:49,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187629518] [2020-09-15 01:04:49,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338665355] [2020-09-15 01:04:49,486 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 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 [2020-09-15 01:04:49,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:04:49,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:49,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:49,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:49,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:49,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:49,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269215605] [2020-09-15 01:04:49,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:49,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:49,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:49,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:49,646 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-09-15 01:04:49,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:49,783 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-15 01:04:49,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:04:49,784 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-15 01:04:49,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:49,785 INFO L225 Difference]: With dead ends: 134 [2020-09-15 01:04:49,785 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:04:49,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:04:49,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:04:49,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 110. [2020-09-15 01:04:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-15 01:04:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-15 01:04:49,791 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-15 01:04:49,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:49,791 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-15 01:04:49,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:49,792 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-15 01:04:49,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:49,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:49,792 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:50,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:50,004 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:50,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:50,005 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-09-15 01:04:50,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:50,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174401005] [2020-09-15 01:04:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:50,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174401005] [2020-09-15 01:04:50,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912692510] [2020-09-15 01:04:50,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:50,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:04:50,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:50,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:50,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:50,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:50,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:50,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249313572] [2020-09-15 01:04:50,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:50,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:50,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:50,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:50,268 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-15 01:04:50,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:50,468 INFO L93 Difference]: Finished difference Result 145 states and 336 transitions. [2020-09-15 01:04:50,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:04:50,469 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-15 01:04:50,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:50,470 INFO L225 Difference]: With dead ends: 145 [2020-09-15 01:04:50,470 INFO L226 Difference]: Without dead ends: 142 [2020-09-15 01:04:50,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:04:50,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-15 01:04:50,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 110. [2020-09-15 01:04:50,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-15 01:04:50,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-15 01:04:50,473 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-15 01:04:50,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:50,474 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-15 01:04:50,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:50,474 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-15 01:04:50,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:50,475 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:50,475 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:50,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-15 01:04:50,677 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:50,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:50,678 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-09-15 01:04:50,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:50,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425741233] [2020-09-15 01:04:50,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:50,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:50,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425741233] [2020-09-15 01:04:50,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663258345] [2020-09-15 01:04:50,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:50,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:04:50,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:50,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:50,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:50,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:50,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:50,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953512707] [2020-09-15 01:04:50,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:50,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:50,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:50,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:50,941 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-15 01:04:51,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:51,181 INFO L93 Difference]: Finished difference Result 147 states and 342 transitions. [2020-09-15 01:04:51,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:04:51,182 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-15 01:04:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:51,183 INFO L225 Difference]: With dead ends: 147 [2020-09-15 01:04:51,183 INFO L226 Difference]: Without dead ends: 144 [2020-09-15 01:04:51,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:04:51,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-15 01:04:51,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2020-09-15 01:04:51,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-15 01:04:51,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-09-15 01:04:51,188 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-09-15 01:04:51,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:51,188 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-09-15 01:04:51,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:51,188 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-09-15 01:04:51,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:51,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:51,189 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:51,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:51,401 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:51,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:51,402 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-09-15 01:04:51,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:51,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555997842] [2020-09-15 01:04:51,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:51,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555997842] [2020-09-15 01:04:51,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935724695] [2020-09-15 01:04:51,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:51,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:51,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:51,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:51,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:51,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773658282] [2020-09-15 01:04:51,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:51,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:51,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:51,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:51,620 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-09-15 01:04:51,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:51,849 INFO L93 Difference]: Finished difference Result 143 states and 336 transitions. [2020-09-15 01:04:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:04:51,850 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-15 01:04:51,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:51,851 INFO L225 Difference]: With dead ends: 143 [2020-09-15 01:04:51,851 INFO L226 Difference]: Without dead ends: 140 [2020-09-15 01:04:51,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:04:51,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-15 01:04:51,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2020-09-15 01:04:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-15 01:04:51,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-09-15 01:04:51,856 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-09-15 01:04:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:51,856 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-09-15 01:04:51,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:51,856 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-09-15 01:04:51,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:51,857 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:51,857 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:52,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-15 01:04:52,067 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:52,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:52,068 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-09-15 01:04:52,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:52,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046301994] [2020-09-15 01:04:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:52,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046301994] [2020-09-15 01:04:52,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747735319] [2020-09-15 01:04:52,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:52,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:52,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:52,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:52,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:52,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:04:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:52,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:52,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:52,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661028939] [2020-09-15 01:04:52,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:52,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:52,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:52,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:52,300 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-09-15 01:04:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:52,621 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-15 01:04:52,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:04:52,621 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-15 01:04:52,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:52,623 INFO L225 Difference]: With dead ends: 150 [2020-09-15 01:04:52,623 INFO L226 Difference]: Without dead ends: 144 [2020-09-15 01:04:52,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:04:52,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-15 01:04:52,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-09-15 01:04:52,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-15 01:04:52,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-09-15 01:04:52,626 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-09-15 01:04:52,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:52,627 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-09-15 01:04:52,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:52,627 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-09-15 01:04:52,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:52,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:52,628 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:52,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:52,836 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:52,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:52,837 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 19 times [2020-09-15 01:04:52,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:52,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969482735] [2020-09-15 01:04:52,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:52,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969482735] [2020-09-15 01:04:52,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171519105] [2020-09-15 01:04:52,923 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 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 [2020-09-15 01:04:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:52,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:52,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:53,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:53,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:53,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450933583] [2020-09-15 01:04:53,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:53,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:53,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:53,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:53,141 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-09-15 01:04:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:53,208 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-09-15 01:04:53,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:04:53,209 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:53,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:53,211 INFO L225 Difference]: With dead ends: 138 [2020-09-15 01:04:53,211 INFO L226 Difference]: Without dead ends: 136 [2020-09-15 01:04:53,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-15 01:04:53,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-09-15 01:04:53,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-15 01:04:53,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-09-15 01:04:53,216 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-09-15 01:04:53,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:53,217 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-09-15 01:04:53,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:53,217 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-09-15 01:04:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:53,218 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:53,218 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:53,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-15 01:04:53,430 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:53,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:53,430 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 20 times [2020-09-15 01:04:53,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:53,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843962798] [2020-09-15 01:04:53,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:53,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843962798] [2020-09-15 01:04:53,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188550031] [2020-09-15 01:04:53,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-15 01:04:53,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:53,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:53,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:53,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:53,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:53,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:53,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624209991] [2020-09-15 01:04:53,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:53,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:53,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:53,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:53,750 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-09-15 01:04:53,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:53,818 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-09-15 01:04:53,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:04:53,818 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:53,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:53,819 INFO L225 Difference]: With dead ends: 145 [2020-09-15 01:04:53,819 INFO L226 Difference]: Without dead ends: 143 [2020-09-15 01:04:53,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:04:53,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-15 01:04:53,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-09-15 01:04:53,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-15 01:04:53,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-09-15 01:04:53,823 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-09-15 01:04:53,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:53,824 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-09-15 01:04:53,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:53,824 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-09-15 01:04:53,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:53,825 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:53,825 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:54,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-15 01:04:54,033 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:54,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:54,034 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 21 times [2020-09-15 01:04:54,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:54,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449931783] [2020-09-15 01:04:54,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:54,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449931783] [2020-09-15 01:04:54,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777724618] [2020-09-15 01:04:54,115 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 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 [2020-09-15 01:04:54,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:04:54,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:54,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:54,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:54,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:54,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:54,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025914917] [2020-09-15 01:04:54,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:54,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:54,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:54,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:54,263 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-09-15 01:04:54,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:54,394 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-15 01:04:54,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:04:54,395 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:54,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:54,396 INFO L225 Difference]: With dead ends: 150 [2020-09-15 01:04:54,396 INFO L226 Difference]: Without dead ends: 148 [2020-09-15 01:04:54,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:04:54,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-15 01:04:54,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-09-15 01:04:54,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-15 01:04:54,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-09-15 01:04:54,401 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-09-15 01:04:54,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:54,401 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-09-15 01:04:54,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:54,402 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-09-15 01:04:54,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:54,402 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:54,402 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:54,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-15 01:04:54,612 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:54,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:54,613 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 22 times [2020-09-15 01:04:54,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:54,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365361324] [2020-09-15 01:04:54,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:54,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365361324] [2020-09-15 01:04:54,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382250985] [2020-09-15 01:04:54,701 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 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 [2020-09-15 01:04:54,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:04:54,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:54,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:54,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:54,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:54,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:54,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691228117] [2020-09-15 01:04:54,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:54,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:54,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:54,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:54,875 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-09-15 01:04:55,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:55,078 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-15 01:04:55,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:04:55,079 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:55,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:55,080 INFO L225 Difference]: With dead ends: 150 [2020-09-15 01:04:55,081 INFO L226 Difference]: Without dead ends: 148 [2020-09-15 01:04:55,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:04:55,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-15 01:04:55,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 120. [2020-09-15 01:04:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-15 01:04:55,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-15 01:04:55,084 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-15 01:04:55,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:55,084 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-15 01:04:55,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:55,084 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-15 01:04:55,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:55,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:55,085 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:55,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-15 01:04:55,286 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:55,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:55,286 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 23 times [2020-09-15 01:04:55,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:55,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951026742] [2020-09-15 01:04:55,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:55,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951026742] [2020-09-15 01:04:55,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050570381] [2020-09-15 01:04:55,380 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 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 [2020-09-15 01:04:55,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:55,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:55,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:55,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:55,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:55,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:55,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109366629] [2020-09-15 01:04:55,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:55,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:55,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:55,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:55,551 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-15 01:04:55,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:55,729 INFO L93 Difference]: Finished difference Result 147 states and 350 transitions. [2020-09-15 01:04:55,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:04:55,729 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:55,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:55,730 INFO L225 Difference]: With dead ends: 147 [2020-09-15 01:04:55,730 INFO L226 Difference]: Without dead ends: 145 [2020-09-15 01:04:55,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:04:55,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-15 01:04:55,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 118. [2020-09-15 01:04:55,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-15 01:04:55,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-09-15 01:04:55,734 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-09-15 01:04:55,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:55,734 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-09-15 01:04:55,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:55,735 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-09-15 01:04:55,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:55,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:55,735 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:55,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:55,938 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:55,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:55,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 24 times [2020-09-15 01:04:55,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:55,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648831468] [2020-09-15 01:04:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:56,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648831468] [2020-09-15 01:04:56,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987490181] [2020-09-15 01:04:56,078 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 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 [2020-09-15 01:04:56,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:04:56,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:56,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:56,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:56,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:56,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:56,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626269074] [2020-09-15 01:04:56,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:56,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:56,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:56,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:56,300 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-09-15 01:04:56,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:56,399 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-09-15 01:04:56,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:04:56,400 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:56,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:56,401 INFO L225 Difference]: With dead ends: 152 [2020-09-15 01:04:56,402 INFO L226 Difference]: Without dead ends: 150 [2020-09-15 01:04:56,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:04:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-15 01:04:56,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-09-15 01:04:56,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-15 01:04:56,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-09-15 01:04:56,408 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-09-15 01:04:56,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:56,411 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-09-15 01:04:56,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:56,411 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-09-15 01:04:56,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:56,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:56,412 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:56,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-09-15 01:04:56,625 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:56,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:56,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 25 times [2020-09-15 01:04:56,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:56,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047794304] [2020-09-15 01:04:56,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:56,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047794304] [2020-09-15 01:04:56,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011859835] [2020-09-15 01:04:56,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-15 01:04:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:56,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:56,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:56,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:56,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:56,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950220939] [2020-09-15 01:04:56,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:56,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:56,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:56,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:56,950 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-09-15 01:04:57,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:57,028 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-09-15 01:04:57,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:04:57,028 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:57,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:57,030 INFO L225 Difference]: With dead ends: 153 [2020-09-15 01:04:57,030 INFO L226 Difference]: Without dead ends: 151 [2020-09-15 01:04:57,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:04:57,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-15 01:04:57,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-09-15 01:04:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-15 01:04:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-15 01:04:57,035 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-15 01:04:57,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:57,036 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-15 01:04:57,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-15 01:04:57,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:57,037 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:57,037 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:57,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-15 01:04:57,249 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:57,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:57,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 26 times [2020-09-15 01:04:57,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:57,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461212148] [2020-09-15 01:04:57,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:57,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:57,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461212148] [2020-09-15 01:04:57,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414337571] [2020-09-15 01:04:57,352 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 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 [2020-09-15 01:04:57,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:57,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:57,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:57,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:57,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:57,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:57,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284607277] [2020-09-15 01:04:57,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:57,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:57,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:57,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:57,509 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-15 01:04:57,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:57,667 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-15 01:04:57,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:04:57,668 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:57,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:57,670 INFO L225 Difference]: With dead ends: 156 [2020-09-15 01:04:57,670 INFO L226 Difference]: Without dead ends: 154 [2020-09-15 01:04:57,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:04:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-15 01:04:57,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-09-15 01:04:57,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-15 01:04:57,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-09-15 01:04:57,673 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-09-15 01:04:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:57,673 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-09-15 01:04:57,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:57,674 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-09-15 01:04:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:57,674 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:57,674 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:57,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:57,875 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:57,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:57,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 27 times [2020-09-15 01:04:57,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:57,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150402327] [2020-09-15 01:04:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:57,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150402327] [2020-09-15 01:04:57,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25993933] [2020-09-15 01:04:57,984 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 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 [2020-09-15 01:04:58,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:04:58,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:58,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:58,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:58,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:58,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:58,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764530768] [2020-09-15 01:04:58,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:58,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:58,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:58,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:58,160 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-09-15 01:04:58,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:58,248 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-09-15 01:04:58,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:04:58,248 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:58,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:58,250 INFO L225 Difference]: With dead ends: 148 [2020-09-15 01:04:58,250 INFO L226 Difference]: Without dead ends: 146 [2020-09-15 01:04:58,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:04:58,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-15 01:04:58,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-09-15 01:04:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-15 01:04:58,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-15 01:04:58,256 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-15 01:04:58,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:58,256 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-15 01:04:58,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:58,257 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-15 01:04:58,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:58,257 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:58,257 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:58,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-15 01:04:58,468 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:58,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:58,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 28 times [2020-09-15 01:04:58,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:58,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256345726] [2020-09-15 01:04:58,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:58,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256345726] [2020-09-15 01:04:58,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838542085] [2020-09-15 01:04:58,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-15 01:04:58,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:04:58,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:58,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:58,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:58,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:58,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:58,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826523387] [2020-09-15 01:04:58,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:58,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:58,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:58,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:58,748 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-15 01:04:58,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:58,880 INFO L93 Difference]: Finished difference Result 149 states and 352 transitions. [2020-09-15 01:04:58,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:04:58,880 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:58,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:58,882 INFO L225 Difference]: With dead ends: 149 [2020-09-15 01:04:58,882 INFO L226 Difference]: Without dead ends: 147 [2020-09-15 01:04:58,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:04:58,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-15 01:04:58,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 120. [2020-09-15 01:04:58,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-15 01:04:58,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-09-15 01:04:58,886 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-09-15 01:04:58,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:58,886 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-09-15 01:04:58,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:58,886 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-09-15 01:04:58,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:58,887 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:58,887 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:59,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:59,088 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:59,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:59,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 29 times [2020-09-15 01:04:59,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:59,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553289187] [2020-09-15 01:04:59,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:59,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553289187] [2020-09-15 01:04:59,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994195776] [2020-09-15 01:04:59,176 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 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 [2020-09-15 01:04:59,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:59,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:59,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:59,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:59,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:59,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:59,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297044623] [2020-09-15 01:04:59,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:59,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:59,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:59,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:59,343 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-09-15 01:04:59,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:59,471 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-09-15 01:04:59,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:04:59,472 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:59,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:59,473 INFO L225 Difference]: With dead ends: 149 [2020-09-15 01:04:59,473 INFO L226 Difference]: Without dead ends: 147 [2020-09-15 01:04:59,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:04:59,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-15 01:04:59,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-09-15 01:04:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-15 01:04:59,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-15 01:04:59,478 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-15 01:04:59,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:59,478 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-15 01:04:59,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:59,478 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-15 01:04:59,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:59,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:59,479 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:59,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-15 01:04:59,680 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:59,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:59,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 30 times [2020-09-15 01:04:59,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:59,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040082753] [2020-09-15 01:04:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:59,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040082753] [2020-09-15 01:04:59,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497611372] [2020-09-15 01:04:59,769 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 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 [2020-09-15 01:04:59,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:04:59,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:59,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:04:59,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:59,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:59,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-15 01:04:59,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791170106] [2020-09-15 01:04:59,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:04:59,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:59,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:04:59,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:04:59,879 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 9 states. [2020-09-15 01:05:00,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:00,077 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-09-15 01:05:00,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:05:00,077 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-15 01:05:00,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:00,078 INFO L225 Difference]: With dead ends: 164 [2020-09-15 01:05:00,079 INFO L226 Difference]: Without dead ends: 159 [2020-09-15 01:05:00,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:05:00,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-15 01:05:00,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-15 01:05:00,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-15 01:05:00,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-09-15 01:05:00,085 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-09-15 01:05:00,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:00,085 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-09-15 01:05:00,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:05:00,085 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-09-15 01:05:00,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:00,086 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:00,086 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:00,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-15 01:05:00,298 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:00,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:00,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 31 times [2020-09-15 01:05:00,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:00,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802914620] [2020-09-15 01:05:00,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:00,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802914620] [2020-09-15 01:05:00,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506233617] [2020-09-15 01:05:00,393 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 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 [2020-09-15 01:05:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:00,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:00,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:00,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:00,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:00,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135870886] [2020-09-15 01:05:00,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:00,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:00,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:00,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:00,559 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-09-15 01:05:00,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:00,797 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-15 01:05:00,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:05:00,798 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:00,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:00,800 INFO L225 Difference]: With dead ends: 156 [2020-09-15 01:05:00,800 INFO L226 Difference]: Without dead ends: 154 [2020-09-15 01:05:00,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:05:00,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-15 01:05:00,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-09-15 01:05:00,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-15 01:05:00,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-15 01:05:00,805 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-15 01:05:00,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:00,805 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-15 01:05:00,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:00,805 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-15 01:05:00,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:00,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:00,806 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:01,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-15 01:05:01,016 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:01,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:01,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 32 times [2020-09-15 01:05:01,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:01,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794715247] [2020-09-15 01:05:01,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:01,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794715247] [2020-09-15 01:05:01,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008784229] [2020-09-15 01:05:01,139 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 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 [2020-09-15 01:05:01,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:01,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:01,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:01,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:01,296 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:01,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:01,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:01,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573725682] [2020-09-15 01:05:01,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:01,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:01,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:01,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:01,336 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-15 01:05:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:01,773 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-09-15 01:05:01,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:05:01,774 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:01,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:01,775 INFO L225 Difference]: With dead ends: 176 [2020-09-15 01:05:01,776 INFO L226 Difference]: Without dead ends: 171 [2020-09-15 01:05:01,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:05:01,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-15 01:05:01,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-09-15 01:05:01,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-15 01:05:01,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-15 01:05:01,780 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-15 01:05:01,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:01,780 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-15 01:05:01,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:01,781 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-15 01:05:01,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:01,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:01,781 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:01,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-15 01:05:01,993 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:01,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:01,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 33 times [2020-09-15 01:05:01,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:01,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067703289] [2020-09-15 01:05:01,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:02,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067703289] [2020-09-15 01:05:02,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575633080] [2020-09-15 01:05:02,070 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 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 [2020-09-15 01:05:02,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:05:02,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:02,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:02,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:02,229 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:05:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:02,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:02,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:02,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148828386] [2020-09-15 01:05:02,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:02,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:02,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:02,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:02,267 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-15 01:05:02,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:02,550 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-09-15 01:05:02,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:05:02,551 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:02,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:02,552 INFO L225 Difference]: With dead ends: 166 [2020-09-15 01:05:02,552 INFO L226 Difference]: Without dead ends: 161 [2020-09-15 01:05:02,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:05:02,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-15 01:05:02,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-09-15 01:05:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-15 01:05:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-09-15 01:05:02,556 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-09-15 01:05:02,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:02,556 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-09-15 01:05:02,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:02,556 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-09-15 01:05:02,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:02,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:02,557 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:02,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:02,767 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:02,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:02,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 34 times [2020-09-15 01:05:02,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:02,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33958161] [2020-09-15 01:05:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:02,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33958161] [2020-09-15 01:05:02,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020353981] [2020-09-15 01:05:02,864 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 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 [2020-09-15 01:05:02,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:05:02,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:02,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:02,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:03,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:03,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:03,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767770517] [2020-09-15 01:05:03,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:03,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:03,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:03,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:03,011 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-09-15 01:05:03,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:03,208 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-09-15 01:05:03,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:05:03,208 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:03,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:03,210 INFO L225 Difference]: With dead ends: 163 [2020-09-15 01:05:03,210 INFO L226 Difference]: Without dead ends: 161 [2020-09-15 01:05:03,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:05:03,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-15 01:05:03,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-09-15 01:05:03,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-15 01:05:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-09-15 01:05:03,214 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-09-15 01:05:03,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:03,215 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-09-15 01:05:03,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-09-15 01:05:03,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:03,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:03,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:03,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-09-15 01:05:03,426 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:03,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:03,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 35 times [2020-09-15 01:05:03,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:03,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616907495] [2020-09-15 01:05:03,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:03,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616907495] [2020-09-15 01:05:03,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84518028] [2020-09-15 01:05:03,504 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 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 [2020-09-15 01:05:03,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:03,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:03,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:03,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:03,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:03,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:03,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083980549] [2020-09-15 01:05:03,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:03,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:03,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:03,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:03,682 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-09-15 01:05:04,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:04,056 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-09-15 01:05:04,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:05:04,056 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:04,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:04,058 INFO L225 Difference]: With dead ends: 170 [2020-09-15 01:05:04,058 INFO L226 Difference]: Without dead ends: 168 [2020-09-15 01:05:04,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:05:04,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-15 01:05:04,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-09-15 01:05:04,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-15 01:05:04,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-09-15 01:05:04,063 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-09-15 01:05:04,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:04,064 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-09-15 01:05:04,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:04,064 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-09-15 01:05:04,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:04,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:04,065 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:04,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:04,275 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:04,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:04,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 36 times [2020-09-15 01:05:04,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:04,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777237137] [2020-09-15 01:05:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:04,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:04,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777237137] [2020-09-15 01:05:04,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571416422] [2020-09-15 01:05:04,354 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 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 [2020-09-15 01:05:04,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:05:04,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:04,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:04,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:04,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:04,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:04,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:04,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802108151] [2020-09-15 01:05:04,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:04,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:04,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:04,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:04,519 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-09-15 01:05:04,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:04,927 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-09-15 01:05:04,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:05:04,928 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:04,929 INFO L225 Difference]: With dead ends: 177 [2020-09-15 01:05:04,929 INFO L226 Difference]: Without dead ends: 172 [2020-09-15 01:05:04,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:05:04,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-15 01:05:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-09-15 01:05:04,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-15 01:05:04,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-09-15 01:05:04,934 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-09-15 01:05:04,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:04,934 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-09-15 01:05:04,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:04,934 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-09-15 01:05:04,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:04,935 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:04,935 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:05,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-09-15 01:05:05,145 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:05,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:05,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 37 times [2020-09-15 01:05:05,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:05,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333946993] [2020-09-15 01:05:05,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:05,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:05,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333946993] [2020-09-15 01:05:05,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094479975] [2020-09-15 01:05:05,240 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 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 [2020-09-15 01:05:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:05,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:05,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:05,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:05:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:05,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:05,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:05,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721164528] [2020-09-15 01:05:05,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:05,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:05,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:05,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:05,357 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-09-15 01:05:05,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:05,850 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-09-15 01:05:05,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:05:05,854 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:05,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:05,855 INFO L225 Difference]: With dead ends: 190 [2020-09-15 01:05:05,855 INFO L226 Difference]: Without dead ends: 182 [2020-09-15 01:05:05,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:05:05,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-15 01:05:05,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-09-15 01:05:05,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-15 01:05:05,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-09-15 01:05:05,858 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-09-15 01:05:05,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:05,858 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-09-15 01:05:05,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:05,859 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-09-15 01:05:05,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:05,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:05,859 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:06,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-15 01:05:06,067 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:06,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:06,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 38 times [2020-09-15 01:05:06,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:06,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105803800] [2020-09-15 01:05:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:06,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105803800] [2020-09-15 01:05:06,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972726018] [2020-09-15 01:05:06,143 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 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 [2020-09-15 01:05:06,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:06,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:06,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:06,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:06,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:06,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:06,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:06,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424616945] [2020-09-15 01:05:06,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:06,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:06,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:06,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:06,317 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-09-15 01:05:06,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:06,787 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-09-15 01:05:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:05:06,788 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:06,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:06,790 INFO L225 Difference]: With dead ends: 180 [2020-09-15 01:05:06,790 INFO L226 Difference]: Without dead ends: 175 [2020-09-15 01:05:06,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:05:06,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-15 01:05:06,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-09-15 01:05:06,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-15 01:05:06,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-09-15 01:05:06,793 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-09-15 01:05:06,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:06,794 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-09-15 01:05:06,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:06,794 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-09-15 01:05:06,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:06,795 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:06,795 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:07,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:07,005 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:07,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:07,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 39 times [2020-09-15 01:05:07,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:07,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18375402] [2020-09-15 01:05:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:07,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18375402] [2020-09-15 01:05:07,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911426410] [2020-09-15 01:05:07,094 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 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 [2020-09-15 01:05:07,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:05:07,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:07,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:07,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:07,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:07,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:07,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994908792] [2020-09-15 01:05:07,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:07,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:07,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:07,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:07,275 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-09-15 01:05:07,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:07,532 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-09-15 01:05:07,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:05:07,533 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:07,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:07,534 INFO L225 Difference]: With dead ends: 164 [2020-09-15 01:05:07,534 INFO L226 Difference]: Without dead ends: 162 [2020-09-15 01:05:07,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:05:07,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-15 01:05:07,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-09-15 01:05:07,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-15 01:05:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-09-15 01:05:07,539 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-09-15 01:05:07,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:07,539 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-09-15 01:05:07,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:07,539 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-09-15 01:05:07,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:07,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:07,540 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:07,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-15 01:05:07,741 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:07,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:07,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 40 times [2020-09-15 01:05:07,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:07,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922374163] [2020-09-15 01:05:07,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:07,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:07,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922374163] [2020-09-15 01:05:07,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715085193] [2020-09-15 01:05:07,863 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 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 [2020-09-15 01:05:07,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:05:07,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:07,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:07,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:08,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:08,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:08,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075395275] [2020-09-15 01:05:08,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:08,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:08,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:08,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:08,017 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-09-15 01:05:08,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:08,245 INFO L93 Difference]: Finished difference Result 159 states and 368 transitions. [2020-09-15 01:05:08,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:05:08,246 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:08,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:08,247 INFO L225 Difference]: With dead ends: 159 [2020-09-15 01:05:08,247 INFO L226 Difference]: Without dead ends: 157 [2020-09-15 01:05:08,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:05:08,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-15 01:05:08,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 118. [2020-09-15 01:05:08,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-15 01:05:08,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-09-15 01:05:08,251 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-09-15 01:05:08,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:08,251 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-09-15 01:05:08,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:08,252 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-09-15 01:05:08,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:08,252 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:08,252 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:08,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-15 01:05:08,462 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:08,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:08,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 41 times [2020-09-15 01:05:08,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:08,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244354790] [2020-09-15 01:05:08,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:08,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244354790] [2020-09-15 01:05:08,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206053682] [2020-09-15 01:05:08,549 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 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 [2020-09-15 01:05:08,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:05:08,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:08,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:08,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:08,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:08,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:08,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349826954] [2020-09-15 01:05:08,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:08,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:08,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:08,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:08,720 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-09-15 01:05:09,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:09,092 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2020-09-15 01:05:09,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:05:09,093 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:09,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:09,094 INFO L225 Difference]: With dead ends: 175 [2020-09-15 01:05:09,094 INFO L226 Difference]: Without dead ends: 173 [2020-09-15 01:05:09,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:05:09,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-15 01:05:09,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 118. [2020-09-15 01:05:09,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-15 01:05:09,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-09-15 01:05:09,098 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-09-15 01:05:09,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:09,099 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-09-15 01:05:09,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:09,099 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-09-15 01:05:09,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:09,100 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:09,100 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:09,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-15 01:05:09,301 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:09,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:09,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 42 times [2020-09-15 01:05:09,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:09,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626766264] [2020-09-15 01:05:09,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:09,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626766264] [2020-09-15 01:05:09,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975712023] [2020-09-15 01:05:09,384 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 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 [2020-09-15 01:05:09,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:05:09,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:09,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:09,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:09,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:09,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:09,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361456351] [2020-09-15 01:05:09,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:09,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:09,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:09,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:09,546 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-09-15 01:05:09,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:09,927 INFO L93 Difference]: Finished difference Result 162 states and 374 transitions. [2020-09-15 01:05:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:05:09,928 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:09,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:09,930 INFO L225 Difference]: With dead ends: 162 [2020-09-15 01:05:09,930 INFO L226 Difference]: Without dead ends: 160 [2020-09-15 01:05:09,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:05:09,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-15 01:05:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 118. [2020-09-15 01:05:09,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-15 01:05:09,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-15 01:05:09,933 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-15 01:05:09,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:09,934 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-15 01:05:09,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:09,934 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-15 01:05:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:09,935 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:09,935 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:10,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:10,138 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:10,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:10,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 43 times [2020-09-15 01:05:10,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:10,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163485309] [2020-09-15 01:05:10,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:10,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163485309] [2020-09-15 01:05:10,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959504972] [2020-09-15 01:05:10,214 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 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 [2020-09-15 01:05:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:10,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:10,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:10,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:10,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:10,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292743316] [2020-09-15 01:05:10,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:10,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:10,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:10,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:10,387 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-15 01:05:10,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:10,870 INFO L93 Difference]: Finished difference Result 171 states and 400 transitions. [2020-09-15 01:05:10,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:05:10,871 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:10,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:10,872 INFO L225 Difference]: With dead ends: 171 [2020-09-15 01:05:10,872 INFO L226 Difference]: Without dead ends: 169 [2020-09-15 01:05:10,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:05:10,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-15 01:05:10,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 120. [2020-09-15 01:05:10,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-15 01:05:10,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-15 01:05:10,875 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-15 01:05:10,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:10,876 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-15 01:05:10,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:10,876 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-15 01:05:10,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:10,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:10,876 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:11,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:11,083 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:11,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:11,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 44 times [2020-09-15 01:05:11,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:11,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676319342] [2020-09-15 01:05:11,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:11,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676319342] [2020-09-15 01:05:11,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795871478] [2020-09-15 01:05:11,165 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 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 [2020-09-15 01:05:11,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:11,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:11,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:11,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:11,308 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:11,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:11,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:11,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716114479] [2020-09-15 01:05:11,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:11,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:11,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:11,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:11,320 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-15 01:05:11,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:11,788 INFO L93 Difference]: Finished difference Result 165 states and 396 transitions. [2020-09-15 01:05:11,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:05:11,788 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:11,790 INFO L225 Difference]: With dead ends: 165 [2020-09-15 01:05:11,790 INFO L226 Difference]: Without dead ends: 160 [2020-09-15 01:05:11,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:05:11,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-15 01:05:11,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 121. [2020-09-15 01:05:11,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-15 01:05:11,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-15 01:05:11,795 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-15 01:05:11,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:11,796 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-15 01:05:11,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:11,796 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-15 01:05:11,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:11,796 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:11,797 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:12,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:12,007 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:12,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:12,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 45 times [2020-09-15 01:05:12,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:12,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230991770] [2020-09-15 01:05:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:12,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230991770] [2020-09-15 01:05:12,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393081779] [2020-09-15 01:05:12,091 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 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 [2020-09-15 01:05:12,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:05:12,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:12,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:12,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:12,247 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:05:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:12,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:12,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:12,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25690985] [2020-09-15 01:05:12,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:12,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:12,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:12,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:12,294 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-15 01:05:12,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:12,956 INFO L93 Difference]: Finished difference Result 194 states and 461 transitions. [2020-09-15 01:05:12,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:05:12,956 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:12,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:12,958 INFO L225 Difference]: With dead ends: 194 [2020-09-15 01:05:12,958 INFO L226 Difference]: Without dead ends: 186 [2020-09-15 01:05:12,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:05:12,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-15 01:05:12,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 118. [2020-09-15 01:05:12,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-15 01:05:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-15 01:05:12,963 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-15 01:05:12,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:12,963 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-15 01:05:12,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:12,964 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-15 01:05:12,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:12,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:12,965 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:13,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:13,166 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:13,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:13,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 46 times [2020-09-15 01:05:13,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:13,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314373717] [2020-09-15 01:05:13,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:13,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314373717] [2020-09-15 01:05:13,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073832975] [2020-09-15 01:05:13,260 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 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 [2020-09-15 01:05:13,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:05:13,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:13,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:13,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:13,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:13,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:13,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71836998] [2020-09-15 01:05:13,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:13,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:13,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:13,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:13,412 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-15 01:05:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:13,863 INFO L93 Difference]: Finished difference Result 168 states and 393 transitions. [2020-09-15 01:05:13,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:05:13,864 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:13,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:13,865 INFO L225 Difference]: With dead ends: 168 [2020-09-15 01:05:13,865 INFO L226 Difference]: Without dead ends: 166 [2020-09-15 01:05:13,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:05:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-15 01:05:13,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-09-15 01:05:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-15 01:05:13,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-15 01:05:13,869 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-15 01:05:13,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:13,870 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-15 01:05:13,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:13,870 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-15 01:05:13,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:13,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:13,870 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:14,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-15 01:05:14,074 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:14,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:14,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 47 times [2020-09-15 01:05:14,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:14,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36401534] [2020-09-15 01:05:14,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:14,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36401534] [2020-09-15 01:05:14,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905747784] [2020-09-15 01:05:14,158 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 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 [2020-09-15 01:05:14,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:14,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:14,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:14,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:14,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:14,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:14,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:14,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079883522] [2020-09-15 01:05:14,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:14,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:14,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:14,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:14,294 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-15 01:05:14,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:14,863 INFO L93 Difference]: Finished difference Result 181 states and 430 transitions. [2020-09-15 01:05:14,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:05:14,864 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:14,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:14,865 INFO L225 Difference]: With dead ends: 181 [2020-09-15 01:05:14,865 INFO L226 Difference]: Without dead ends: 173 [2020-09-15 01:05:14,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:05:14,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-15 01:05:14,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 119. [2020-09-15 01:05:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-15 01:05:14,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-09-15 01:05:14,869 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-09-15 01:05:14,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:14,869 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-09-15 01:05:14,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:14,870 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-09-15 01:05:14,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:14,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:14,870 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:15,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:15,080 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:15,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:15,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 48 times [2020-09-15 01:05:15,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:15,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098858789] [2020-09-15 01:05:15,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:15,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098858789] [2020-09-15 01:05:15,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581300089] [2020-09-15 01:05:15,213 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 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 [2020-09-15 01:05:15,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:05:15,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:15,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:15,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:15,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:05:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:15,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:15,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:15,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658307335] [2020-09-15 01:05:15,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:15,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:15,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:15,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:15,358 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-09-15 01:05:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:15,960 INFO L93 Difference]: Finished difference Result 171 states and 400 transitions. [2020-09-15 01:05:15,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:05:15,960 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:15,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:15,962 INFO L225 Difference]: With dead ends: 171 [2020-09-15 01:05:15,962 INFO L226 Difference]: Without dead ends: 166 [2020-09-15 01:05:15,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:05:15,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-15 01:05:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 114. [2020-09-15 01:05:15,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-15 01:05:15,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-09-15 01:05:15,965 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-09-15 01:05:15,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:15,965 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-09-15 01:05:15,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-09-15 01:05:15,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:15,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:15,966 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:16,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-15 01:05:16,177 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:16,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:16,178 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-09-15 01:05:16,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:16,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225962973] [2020-09-15 01:05:16,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:16,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225962973] [2020-09-15 01:05:16,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911412448] [2020-09-15 01:05:16,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:16,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:05:16,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:16,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:16,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:16,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:16,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:16,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 01:05:16,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479352198] [2020-09-15 01:05:16,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:05:16,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:16,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:05:16,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:05:16,475 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-09-15 01:05:16,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:16,652 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-09-15 01:05:16,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:05:16,653 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-09-15 01:05:16,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:16,654 INFO L225 Difference]: With dead ends: 164 [2020-09-15 01:05:16,654 INFO L226 Difference]: Without dead ends: 159 [2020-09-15 01:05:16,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:05:16,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-15 01:05:16,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-15 01:05:16,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-15 01:05:16,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-09-15 01:05:16,658 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-09-15 01:05:16,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:16,658 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-09-15 01:05:16,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:05:16,658 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-09-15 01:05:16,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:16,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:16,659 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:16,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:16,870 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:16,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:16,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-09-15 01:05:16,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:16,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952506058] [2020-09-15 01:05:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:16,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952506058] [2020-09-15 01:05:16,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323344617] [2020-09-15 01:05:16,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:17,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:05:17,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:17,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:17,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:17,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:17,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:17,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967106831] [2020-09-15 01:05:17,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:17,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:17,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:17,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:17,163 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-09-15 01:05:17,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:17,347 INFO L93 Difference]: Finished difference Result 158 states and 371 transitions. [2020-09-15 01:05:17,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:05:17,348 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-15 01:05:17,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:17,349 INFO L225 Difference]: With dead ends: 158 [2020-09-15 01:05:17,350 INFO L226 Difference]: Without dead ends: 155 [2020-09-15 01:05:17,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:05:17,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-15 01:05:17,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 129. [2020-09-15 01:05:17,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-15 01:05:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-15 01:05:17,354 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-15 01:05:17,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:17,354 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-15 01:05:17,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:17,354 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-15 01:05:17,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:17,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:17,355 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:17,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-15 01:05:17,566 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:17,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:17,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-09-15 01:05:17,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:17,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430967256] [2020-09-15 01:05:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:17,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430967256] [2020-09-15 01:05:17,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774479070] [2020-09-15 01:05:17,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:17,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:05:17,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:17,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:17,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:17,881 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:17,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:17,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:17,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238787705] [2020-09-15 01:05:17,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:17,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:17,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:17,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:17,883 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-15 01:05:18,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:18,148 INFO L93 Difference]: Finished difference Result 172 states and 398 transitions. [2020-09-15 01:05:18,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:05:18,149 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-15 01:05:18,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:18,150 INFO L225 Difference]: With dead ends: 172 [2020-09-15 01:05:18,150 INFO L226 Difference]: Without dead ends: 169 [2020-09-15 01:05:18,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:05:18,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-15 01:05:18,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 129. [2020-09-15 01:05:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-15 01:05:18,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-15 01:05:18,155 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-15 01:05:18,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:18,155 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-15 01:05:18,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:18,155 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-15 01:05:18,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:18,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:18,156 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:18,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:18,366 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:18,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:18,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-09-15 01:05:18,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:18,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473325302] [2020-09-15 01:05:18,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:18,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473325302] [2020-09-15 01:05:18,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760937841] [2020-09-15 01:05:18,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:18,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:05:18,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:18,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:18,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:18,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:18,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:18,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506457867] [2020-09-15 01:05:18,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:18,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:18,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:18,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:18,672 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-15 01:05:19,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:19,013 INFO L93 Difference]: Finished difference Result 177 states and 410 transitions. [2020-09-15 01:05:19,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:05:19,013 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-15 01:05:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:19,015 INFO L225 Difference]: With dead ends: 177 [2020-09-15 01:05:19,015 INFO L226 Difference]: Without dead ends: 174 [2020-09-15 01:05:19,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:05:19,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-15 01:05:19,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 130. [2020-09-15 01:05:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-15 01:05:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-09-15 01:05:19,019 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-09-15 01:05:19,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:19,021 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-09-15 01:05:19,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:19,021 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-09-15 01:05:19,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:19,021 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:19,022 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:19,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:19,223 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:19,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:19,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-09-15 01:05:19,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:19,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177685256] [2020-09-15 01:05:19,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:19,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177685256] [2020-09-15 01:05:19,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015830603] [2020-09-15 01:05:19,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:19,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:05:19,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:19,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:19,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:19,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:19,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:19,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623032394] [2020-09-15 01:05:19,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:19,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:19,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:19,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:19,509 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-09-15 01:05:19,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:19,870 INFO L93 Difference]: Finished difference Result 176 states and 410 transitions. [2020-09-15 01:05:19,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:05:19,871 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-15 01:05:19,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:19,872 INFO L225 Difference]: With dead ends: 176 [2020-09-15 01:05:19,873 INFO L226 Difference]: Without dead ends: 173 [2020-09-15 01:05:19,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:05:19,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-15 01:05:19,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 132. [2020-09-15 01:05:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-15 01:05:19,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-09-15 01:05:19,876 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-09-15 01:05:19,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:19,876 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-09-15 01:05:19,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:19,876 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-09-15 01:05:19,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:19,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:19,877 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:20,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-09-15 01:05:20,078 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:20,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:20,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-09-15 01:05:20,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:20,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97316592] [2020-09-15 01:05:20,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:20,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97316592] [2020-09-15 01:05:20,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242908284] [2020-09-15 01:05:20,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:20,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:20,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:20,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:20,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:20,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438076834] [2020-09-15 01:05:20,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:20,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:20,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:20,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:20,359 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-09-15 01:05:20,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:20,660 INFO L93 Difference]: Finished difference Result 169 states and 398 transitions. [2020-09-15 01:05:20,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:05:20,660 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-15 01:05:20,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:20,662 INFO L225 Difference]: With dead ends: 169 [2020-09-15 01:05:20,662 INFO L226 Difference]: Without dead ends: 166 [2020-09-15 01:05:20,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:05:20,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-15 01:05:20,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 134. [2020-09-15 01:05:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-15 01:05:20,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-09-15 01:05:20,665 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-09-15 01:05:20,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:20,666 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-09-15 01:05:20,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:20,666 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-09-15 01:05:20,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:20,666 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:20,666 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:20,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:20,874 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:20,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:20,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-09-15 01:05:20,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:20,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942359928] [2020-09-15 01:05:20,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:21,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942359928] [2020-09-15 01:05:21,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885511031] [2020-09-15 01:05:21,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:21,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:21,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:21,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:21,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:21,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:05:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:21,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:21,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:21,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314989321] [2020-09-15 01:05:21,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:21,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:21,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:21,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:21,179 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-09-15 01:05:21,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:21,571 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-09-15 01:05:21,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:05:21,572 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-15 01:05:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:21,574 INFO L225 Difference]: With dead ends: 176 [2020-09-15 01:05:21,574 INFO L226 Difference]: Without dead ends: 170 [2020-09-15 01:05:21,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:05:21,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-15 01:05:21,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-09-15 01:05:21,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-15 01:05:21,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-09-15 01:05:21,580 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-09-15 01:05:21,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:21,580 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-09-15 01:05:21,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:21,581 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-09-15 01:05:21,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:21,581 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:21,582 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:21,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:21,794 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:21,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:21,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 49 times [2020-09-15 01:05:21,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:21,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447637310] [2020-09-15 01:05:21,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:21,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447637310] [2020-09-15 01:05:21,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75674850] [2020-09-15 01:05:21,937 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 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 [2020-09-15 01:05:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:22,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:22,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:22,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:22,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:22,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702894450] [2020-09-15 01:05:22,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:22,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:22,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:22,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:22,194 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-09-15 01:05:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:22,285 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-09-15 01:05:22,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:05:22,286 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:22,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:22,287 INFO L225 Difference]: With dead ends: 163 [2020-09-15 01:05:22,287 INFO L226 Difference]: Without dead ends: 161 [2020-09-15 01:05:22,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:22,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-15 01:05:22,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-09-15 01:05:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-15 01:05:22,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-09-15 01:05:22,293 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-09-15 01:05:22,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:22,294 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-09-15 01:05:22,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:22,294 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-09-15 01:05:22,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:22,295 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:22,295 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:22,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-15 01:05:22,508 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:22,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:22,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 50 times [2020-09-15 01:05:22,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:22,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759920795] [2020-09-15 01:05:22,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:22,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759920795] [2020-09-15 01:05:22,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917939096] [2020-09-15 01:05:22,618 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 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 [2020-09-15 01:05:22,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:22,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:22,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:22,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:22,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:22,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:22,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425755431] [2020-09-15 01:05:22,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:22,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:22,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:22,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:22,858 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-09-15 01:05:22,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:22,963 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-09-15 01:05:22,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:05:22,964 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:22,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:22,966 INFO L225 Difference]: With dead ends: 172 [2020-09-15 01:05:22,966 INFO L226 Difference]: Without dead ends: 170 [2020-09-15 01:05:22,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:05:22,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-15 01:05:22,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-09-15 01:05:22,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-15 01:05:22,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-15 01:05:22,972 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-15 01:05:22,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:22,972 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-15 01:05:22,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:22,973 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-15 01:05:22,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:22,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:22,974 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:23,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:23,185 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:23,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:23,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 51 times [2020-09-15 01:05:23,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:23,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516721839] [2020-09-15 01:05:23,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:23,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516721839] [2020-09-15 01:05:23,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886978661] [2020-09-15 01:05:23,288 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 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 [2020-09-15 01:05:23,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:05:23,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:23,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:23,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:23,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:23,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:23,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340518169] [2020-09-15 01:05:23,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:23,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:23,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:23,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:23,550 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-15 01:05:23,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:23,748 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-15 01:05:23,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:05:23,749 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:23,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:23,751 INFO L225 Difference]: With dead ends: 179 [2020-09-15 01:05:23,751 INFO L226 Difference]: Without dead ends: 177 [2020-09-15 01:05:23,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:05:23,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-15 01:05:23,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-09-15 01:05:23,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-15 01:05:23,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-09-15 01:05:23,758 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-09-15 01:05:23,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:23,758 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-09-15 01:05:23,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:23,759 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-09-15 01:05:23,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:23,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:23,759 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:23,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-15 01:05:23,971 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:23,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:23,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 52 times [2020-09-15 01:05:23,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:23,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140395415] [2020-09-15 01:05:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:24,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140395415] [2020-09-15 01:05:24,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807527228] [2020-09-15 01:05:24,070 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 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 [2020-09-15 01:05:24,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:05:24,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:24,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:24,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:24,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:24,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:24,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175202497] [2020-09-15 01:05:24,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:24,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:24,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:24,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:24,274 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-09-15 01:05:24,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:24,464 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-15 01:05:24,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:05:24,465 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:24,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:24,467 INFO L225 Difference]: With dead ends: 179 [2020-09-15 01:05:24,467 INFO L226 Difference]: Without dead ends: 177 [2020-09-15 01:05:24,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:05:24,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-15 01:05:24,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-09-15 01:05:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-15 01:05:24,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-15 01:05:24,470 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-15 01:05:24,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:24,470 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-15 01:05:24,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:24,470 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-15 01:05:24,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:24,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:24,471 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:24,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-09-15 01:05:24,672 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:24,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:24,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 53 times [2020-09-15 01:05:24,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:24,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497291986] [2020-09-15 01:05:24,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:24,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497291986] [2020-09-15 01:05:24,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587748682] [2020-09-15 01:05:24,781 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 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 [2020-09-15 01:05:24,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:24,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:24,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:24,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:24,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:24,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:24,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:24,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664388164] [2020-09-15 01:05:24,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:24,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:24,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:24,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:24,981 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-15 01:05:25,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:25,203 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-09-15 01:05:25,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:05:25,204 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:25,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:25,206 INFO L225 Difference]: With dead ends: 184 [2020-09-15 01:05:25,206 INFO L226 Difference]: Without dead ends: 182 [2020-09-15 01:05:25,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:05:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-15 01:05:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-09-15 01:05:25,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-15 01:05:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-09-15 01:05:25,209 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-09-15 01:05:25,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:25,209 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-09-15 01:05:25,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:25,209 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-09-15 01:05:25,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:25,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:25,210 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:25,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-15 01:05:25,420 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:25,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 54 times [2020-09-15 01:05:25,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:25,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887657812] [2020-09-15 01:05:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:25,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887657812] [2020-09-15 01:05:25,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469352476] [2020-09-15 01:05:25,528 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 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 [2020-09-15 01:05:25,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:05:25,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:25,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:25,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:25,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:25,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:25,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642682804] [2020-09-15 01:05:25,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:25,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:25,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:25,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:25,723 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-09-15 01:05:25,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:25,970 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-09-15 01:05:25,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:05:25,971 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:25,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:25,972 INFO L225 Difference]: With dead ends: 179 [2020-09-15 01:05:25,973 INFO L226 Difference]: Without dead ends: 177 [2020-09-15 01:05:25,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:05:25,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-15 01:05:25,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-09-15 01:05:25,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-15 01:05:25,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-09-15 01:05:25,976 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-09-15 01:05:25,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:25,976 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-09-15 01:05:25,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:25,976 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-09-15 01:05:25,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:25,977 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:25,977 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:26,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:26,178 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:26,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:26,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 55 times [2020-09-15 01:05:26,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:26,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110266164] [2020-09-15 01:05:26,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:26,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110266164] [2020-09-15 01:05:26,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831518442] [2020-09-15 01:05:26,278 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 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 [2020-09-15 01:05:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:26,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:26,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:26,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:26,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:26,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452114988] [2020-09-15 01:05:26,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:26,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:26,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:26,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:26,494 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-09-15 01:05:26,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:26,798 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-09-15 01:05:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:05:26,799 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:26,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:26,800 INFO L225 Difference]: With dead ends: 177 [2020-09-15 01:05:26,800 INFO L226 Difference]: Without dead ends: 175 [2020-09-15 01:05:26,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:05:26,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-15 01:05:26,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 139. [2020-09-15 01:05:26,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-15 01:05:26,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-09-15 01:05:26,804 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-09-15 01:05:26,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:26,804 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-09-15 01:05:26,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:26,804 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-09-15 01:05:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:26,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:26,805 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:27,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:27,014 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:27,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:27,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 56 times [2020-09-15 01:05:27,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:27,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982135031] [2020-09-15 01:05:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:27,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982135031] [2020-09-15 01:05:27,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071597135] [2020-09-15 01:05:27,119 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 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 [2020-09-15 01:05:27,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:27,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:27,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:27,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:27,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:27,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:27,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549973674] [2020-09-15 01:05:27,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:27,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:27,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:27,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:27,332 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-09-15 01:05:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:27,664 INFO L93 Difference]: Finished difference Result 187 states and 443 transitions. [2020-09-15 01:05:27,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:05:27,664 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:27,666 INFO L225 Difference]: With dead ends: 187 [2020-09-15 01:05:27,666 INFO L226 Difference]: Without dead ends: 185 [2020-09-15 01:05:27,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:05:27,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-15 01:05:27,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2020-09-15 01:05:27,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-15 01:05:27,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-09-15 01:05:27,670 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-09-15 01:05:27,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:27,670 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-09-15 01:05:27,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:27,670 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-09-15 01:05:27,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:27,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:27,671 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:27,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:27,882 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:27,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:27,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 57 times [2020-09-15 01:05:27,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:27,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685635850] [2020-09-15 01:05:27,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:27,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685635850] [2020-09-15 01:05:27,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522835136] [2020-09-15 01:05:27,986 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 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 [2020-09-15 01:05:28,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:05:28,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:28,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:28,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:28,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:28,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:28,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332828418] [2020-09-15 01:05:28,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:28,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:28,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:28,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:28,171 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-09-15 01:05:28,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:28,464 INFO L93 Difference]: Finished difference Result 181 states and 433 transitions. [2020-09-15 01:05:28,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:05:28,465 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:28,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:28,467 INFO L225 Difference]: With dead ends: 181 [2020-09-15 01:05:28,467 INFO L226 Difference]: Without dead ends: 179 [2020-09-15 01:05:28,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:05:28,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-15 01:05:28,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 138. [2020-09-15 01:05:28,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-15 01:05:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-09-15 01:05:28,470 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-09-15 01:05:28,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:28,470 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-09-15 01:05:28,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:28,470 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-09-15 01:05:28,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:28,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:28,471 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:28,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:28,672 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:28,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 58 times [2020-09-15 01:05:28,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:28,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604788235] [2020-09-15 01:05:28,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:28,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604788235] [2020-09-15 01:05:28,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861441836] [2020-09-15 01:05:28,835 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 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 [2020-09-15 01:05:28,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:05:28,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:28,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:28,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:29,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:29,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:29,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114558980] [2020-09-15 01:05:29,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:29,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:29,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:29,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:29,029 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-09-15 01:05:29,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:29,122 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-09-15 01:05:29,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:05:29,122 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:29,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:29,124 INFO L225 Difference]: With dead ends: 182 [2020-09-15 01:05:29,124 INFO L226 Difference]: Without dead ends: 180 [2020-09-15 01:05:29,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:05:29,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-15 01:05:29,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-09-15 01:05:29,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-15 01:05:29,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-09-15 01:05:29,127 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-09-15 01:05:29,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:29,127 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-09-15 01:05:29,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:29,127 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-09-15 01:05:29,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:29,128 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:29,128 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:29,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-09-15 01:05:29,329 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:29,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:29,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 59 times [2020-09-15 01:05:29,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:29,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549188674] [2020-09-15 01:05:29,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:29,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549188674] [2020-09-15 01:05:29,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827758894] [2020-09-15 01:05:29,486 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 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 [2020-09-15 01:05:29,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:29,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:29,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:29,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:29,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:29,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:29,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488260379] [2020-09-15 01:05:29,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:29,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:29,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:29,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:29,683 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-09-15 01:05:29,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:29,792 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-09-15 01:05:29,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:05:29,793 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:29,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:29,794 INFO L225 Difference]: With dead ends: 185 [2020-09-15 01:05:29,794 INFO L226 Difference]: Without dead ends: 183 [2020-09-15 01:05:29,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:05:29,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-15 01:05:29,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-09-15 01:05:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:05:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-15 01:05:29,798 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-15 01:05:29,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:29,799 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-15 01:05:29,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:29,799 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-15 01:05:29,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:29,799 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:29,800 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:30,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:30,009 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:30,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:30,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 60 times [2020-09-15 01:05:30,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:30,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265222476] [2020-09-15 01:05:30,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:30,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265222476] [2020-09-15 01:05:30,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868338334] [2020-09-15 01:05:30,149 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 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 [2020-09-15 01:05:30,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:05:30,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:30,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:30,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:30,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:30,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:30,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333711195] [2020-09-15 01:05:30,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:30,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:30,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:30,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:30,406 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-15 01:05:30,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:30,613 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-09-15 01:05:30,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:05:30,614 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:30,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:30,616 INFO L225 Difference]: With dead ends: 191 [2020-09-15 01:05:30,616 INFO L226 Difference]: Without dead ends: 189 [2020-09-15 01:05:30,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:05:30,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-15 01:05:30,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-09-15 01:05:30,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-15 01:05:30,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-09-15 01:05:30,620 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-09-15 01:05:30,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:30,620 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-09-15 01:05:30,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:30,620 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-09-15 01:05:30,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:30,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:30,621 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:30,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:30,830 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:30,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:30,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 61 times [2020-09-15 01:05:30,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:30,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93729822] [2020-09-15 01:05:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:30,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93729822] [2020-09-15 01:05:30,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721428426] [2020-09-15 01:05:30,943 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 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 [2020-09-15 01:05:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:30,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:30,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:31,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:31,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:31,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140610242] [2020-09-15 01:05:31,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:31,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:31,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:31,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:31,143 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-09-15 01:05:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:31,372 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-09-15 01:05:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:05:31,373 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:31,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:31,375 INFO L225 Difference]: With dead ends: 187 [2020-09-15 01:05:31,375 INFO L226 Difference]: Without dead ends: 185 [2020-09-15 01:05:31,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:05:31,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-15 01:05:31,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-09-15 01:05:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:05:31,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-15 01:05:31,379 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-15 01:05:31,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:31,379 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-15 01:05:31,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:31,379 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-15 01:05:31,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:31,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:31,380 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:31,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:31,582 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:31,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:31,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 62 times [2020-09-15 01:05:31,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:31,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078884391] [2020-09-15 01:05:31,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:31,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078884391] [2020-09-15 01:05:31,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143914854] [2020-09-15 01:05:31,712 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 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 [2020-09-15 01:05:31,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:31,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:31,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:31,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:31,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:31,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:31,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730479506] [2020-09-15 01:05:31,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:31,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:31,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:31,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:31,911 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-15 01:05:32,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:32,146 INFO L93 Difference]: Finished difference Result 194 states and 455 transitions. [2020-09-15 01:05:32,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:05:32,147 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:32,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:32,148 INFO L225 Difference]: With dead ends: 194 [2020-09-15 01:05:32,148 INFO L226 Difference]: Without dead ends: 192 [2020-09-15 01:05:32,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:05:32,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-15 01:05:32,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 142. [2020-09-15 01:05:32,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:05:32,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-09-15 01:05:32,152 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-09-15 01:05:32,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:32,153 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-09-15 01:05:32,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:32,153 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-09-15 01:05:32,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:32,154 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:32,154 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:32,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:32,364 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:32,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:32,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 63 times [2020-09-15 01:05:32,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:32,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342670914] [2020-09-15 01:05:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:32,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342670914] [2020-09-15 01:05:32,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774898006] [2020-09-15 01:05:32,482 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 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 [2020-09-15 01:05:32,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:05:32,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:32,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:32,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:32,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:32,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:32,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706045156] [2020-09-15 01:05:32,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:32,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:32,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:32,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:32,685 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-09-15 01:05:32,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:32,936 INFO L93 Difference]: Finished difference Result 186 states and 443 transitions. [2020-09-15 01:05:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:05:32,940 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:32,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:32,941 INFO L225 Difference]: With dead ends: 186 [2020-09-15 01:05:32,942 INFO L226 Difference]: Without dead ends: 184 [2020-09-15 01:05:32,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:05:32,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-15 01:05:32,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 139. [2020-09-15 01:05:32,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-15 01:05:32,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-09-15 01:05:32,944 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-09-15 01:05:32,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:32,945 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-09-15 01:05:32,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:32,945 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-09-15 01:05:32,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:32,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:32,945 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:33,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-15 01:05:33,146 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:33,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:33,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 64 times [2020-09-15 01:05:33,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:33,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347313860] [2020-09-15 01:05:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:33,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347313860] [2020-09-15 01:05:33,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484638624] [2020-09-15 01:05:33,294 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 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 [2020-09-15 01:05:33,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:05:33,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:33,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:33,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:33,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:33,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:33,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056881889] [2020-09-15 01:05:33,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:33,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:33,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:33,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:33,491 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-09-15 01:05:33,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:33,586 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-09-15 01:05:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:05:33,587 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:33,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:33,588 INFO L225 Difference]: With dead ends: 178 [2020-09-15 01:05:33,589 INFO L226 Difference]: Without dead ends: 176 [2020-09-15 01:05:33,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:05:33,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-15 01:05:33,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-09-15 01:05:33,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-15 01:05:33,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-09-15 01:05:33,593 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-09-15 01:05:33,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:33,593 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-09-15 01:05:33,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:33,593 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-09-15 01:05:33,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:33,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:33,594 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:33,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-09-15 01:05:33,797 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:33,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:33,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 65 times [2020-09-15 01:05:33,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:33,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607231497] [2020-09-15 01:05:33,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:33,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607231497] [2020-09-15 01:05:33,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60986141] [2020-09-15 01:05:33,936 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 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 [2020-09-15 01:05:33,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:33,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:33,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:33,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:34,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:34,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:34,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804410266] [2020-09-15 01:05:34,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:34,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:34,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:34,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:34,128 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-09-15 01:05:34,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:34,273 INFO L93 Difference]: Finished difference Result 181 states and 428 transitions. [2020-09-15 01:05:34,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:05:34,274 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:34,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:34,275 INFO L225 Difference]: With dead ends: 181 [2020-09-15 01:05:34,275 INFO L226 Difference]: Without dead ends: 179 [2020-09-15 01:05:34,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:05:34,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-15 01:05:34,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2020-09-15 01:05:34,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-15 01:05:34,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-09-15 01:05:34,280 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-09-15 01:05:34,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:34,280 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-09-15 01:05:34,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:34,281 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-09-15 01:05:34,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:34,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:34,281 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:34,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:34,491 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:34,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:34,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 66 times [2020-09-15 01:05:34,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:34,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132810061] [2020-09-15 01:05:34,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:34,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132810061] [2020-09-15 01:05:34,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460579202] [2020-09-15 01:05:34,616 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 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 [2020-09-15 01:05:34,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:05:34,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:34,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:34,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:34,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:34,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:34,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789480589] [2020-09-15 01:05:34,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:34,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:34,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:34,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:34,888 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-09-15 01:05:35,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:35,122 INFO L93 Difference]: Finished difference Result 187 states and 440 transitions. [2020-09-15 01:05:35,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:05:35,123 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:35,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:35,124 INFO L225 Difference]: With dead ends: 187 [2020-09-15 01:05:35,124 INFO L226 Difference]: Without dead ends: 185 [2020-09-15 01:05:35,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:05:35,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-15 01:05:35,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2020-09-15 01:05:35,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-15 01:05:35,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-09-15 01:05:35,129 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-09-15 01:05:35,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:35,129 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-09-15 01:05:35,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:35,129 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-09-15 01:05:35,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:35,130 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:35,130 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:35,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:35,338 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:35,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:35,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 67 times [2020-09-15 01:05:35,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:35,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589946790] [2020-09-15 01:05:35,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:35,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:35,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589946790] [2020-09-15 01:05:35,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192066134] [2020-09-15 01:05:35,473 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 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 [2020-09-15 01:05:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:35,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:35,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:35,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:35,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:35,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238012261] [2020-09-15 01:05:35,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:35,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:35,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:35,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:35,635 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-09-15 01:05:35,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:35,768 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-09-15 01:05:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:05:35,769 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:35,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:35,770 INFO L225 Difference]: With dead ends: 174 [2020-09-15 01:05:35,771 INFO L226 Difference]: Without dead ends: 172 [2020-09-15 01:05:35,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:05:35,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-15 01:05:35,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-09-15 01:05:35,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:05:35,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-09-15 01:05:35,773 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-09-15 01:05:35,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:35,774 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-09-15 01:05:35,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:35,774 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-09-15 01:05:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:35,774 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:35,774 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:35,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:35,975 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:35,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:35,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 68 times [2020-09-15 01:05:35,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:35,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113245192] [2020-09-15 01:05:35,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:36,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113245192] [2020-09-15 01:05:36,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323979958] [2020-09-15 01:05:36,098 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 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 [2020-09-15 01:05:36,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:36,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:36,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:36,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:36,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:36,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:36,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74257037] [2020-09-15 01:05:36,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:36,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:36,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:36,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:36,295 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-09-15 01:05:36,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:36,464 INFO L93 Difference]: Finished difference Result 177 states and 419 transitions. [2020-09-15 01:05:36,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:05:36,465 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:36,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:36,466 INFO L225 Difference]: With dead ends: 177 [2020-09-15 01:05:36,467 INFO L226 Difference]: Without dead ends: 175 [2020-09-15 01:05:36,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:05:36,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-15 01:05:36,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 141. [2020-09-15 01:05:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-15 01:05:36,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-09-15 01:05:36,470 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-09-15 01:05:36,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:36,471 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-09-15 01:05:36,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:36,471 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-09-15 01:05:36,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:36,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:36,471 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:36,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:36,673 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:36,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:36,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 69 times [2020-09-15 01:05:36,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:36,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619823278] [2020-09-15 01:05:36,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:36,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619823278] [2020-09-15 01:05:36,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220964741] [2020-09-15 01:05:36,771 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 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 [2020-09-15 01:05:36,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:05:36,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:36,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:36,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:36,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:36,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:36,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816924775] [2020-09-15 01:05:36,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:36,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:36,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:36,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:36,967 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-09-15 01:05:37,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:37,147 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-09-15 01:05:37,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:05:37,148 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:37,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:37,149 INFO L225 Difference]: With dead ends: 175 [2020-09-15 01:05:37,149 INFO L226 Difference]: Without dead ends: 173 [2020-09-15 01:05:37,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:05:37,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-15 01:05:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-09-15 01:05:37,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-15 01:05:37,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-15 01:05:37,153 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-15 01:05:37,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:37,153 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-15 01:05:37,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:37,154 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-15 01:05:37,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:37,154 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:37,154 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:37,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:37,362 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:37,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:37,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 70 times [2020-09-15 01:05:37,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:37,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138462735] [2020-09-15 01:05:37,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:37,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138462735] [2020-09-15 01:05:37,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300379217] [2020-09-15 01:05:37,469 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 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 [2020-09-15 01:05:37,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:05:37,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:37,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:37,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:37,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:05:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:37,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:37,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:37,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171129530] [2020-09-15 01:05:37,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:37,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:37,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:37,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:37,683 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-15 01:05:38,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:38,125 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-09-15 01:05:38,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:05:38,126 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:38,127 INFO L225 Difference]: With dead ends: 195 [2020-09-15 01:05:38,128 INFO L226 Difference]: Without dead ends: 190 [2020-09-15 01:05:38,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:05:38,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-15 01:05:38,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-09-15 01:05:38,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-15 01:05:38,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-15 01:05:38,131 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-15 01:05:38,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:38,131 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-15 01:05:38,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:38,131 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-15 01:05:38,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:38,131 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:38,131 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:38,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:38,332 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:38,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:38,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 71 times [2020-09-15 01:05:38,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:38,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614930365] [2020-09-15 01:05:38,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:38,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614930365] [2020-09-15 01:05:38,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040498428] [2020-09-15 01:05:38,438 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 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 [2020-09-15 01:05:38,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:38,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:38,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:38,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:38,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:38,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:38,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415759503] [2020-09-15 01:05:38,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:38,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:38,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:38,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:38,708 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-15 01:05:39,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:39,051 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-09-15 01:05:39,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:05:39,051 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:39,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:39,053 INFO L225 Difference]: With dead ends: 187 [2020-09-15 01:05:39,053 INFO L226 Difference]: Without dead ends: 185 [2020-09-15 01:05:39,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:05:39,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-15 01:05:39,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-09-15 01:05:39,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-15 01:05:39,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-15 01:05:39,057 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-15 01:05:39,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:39,057 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-15 01:05:39,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:39,057 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-15 01:05:39,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:39,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:39,058 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:39,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:39,259 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:39,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:39,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 72 times [2020-09-15 01:05:39,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:39,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700305738] [2020-09-15 01:05:39,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:39,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700305738] [2020-09-15 01:05:39,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531239754] [2020-09-15 01:05:39,407 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 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 [2020-09-15 01:05:39,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:05:39,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:39,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:39,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:39,616 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:39,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:39,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:39,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506518171] [2020-09-15 01:05:39,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:39,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:39,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:39,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:39,662 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-15 01:05:40,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:40,240 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-09-15 01:05:40,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:05:40,241 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:40,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:40,242 INFO L225 Difference]: With dead ends: 212 [2020-09-15 01:05:40,242 INFO L226 Difference]: Without dead ends: 207 [2020-09-15 01:05:40,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:05:40,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-15 01:05:40,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-15 01:05:40,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-15 01:05:40,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-15 01:05:40,246 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-15 01:05:40,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:40,246 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-15 01:05:40,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:40,246 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-15 01:05:40,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:40,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:40,247 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:40,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-15 01:05:40,448 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:40,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:40,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 73 times [2020-09-15 01:05:40,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:40,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385410521] [2020-09-15 01:05:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:40,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385410521] [2020-09-15 01:05:40,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443491203] [2020-09-15 01:05:40,545 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 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 [2020-09-15 01:05:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:40,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:40,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:40,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:05:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:40,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:40,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:40,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118528871] [2020-09-15 01:05:40,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:40,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:40,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:40,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:40,747 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-15 01:05:41,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:41,163 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-15 01:05:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:05:41,164 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:41,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:41,166 INFO L225 Difference]: With dead ends: 202 [2020-09-15 01:05:41,166 INFO L226 Difference]: Without dead ends: 197 [2020-09-15 01:05:41,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:05:41,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-15 01:05:41,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-09-15 01:05:41,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-15 01:05:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-09-15 01:05:41,170 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-09-15 01:05:41,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:41,170 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-09-15 01:05:41,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:41,170 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-09-15 01:05:41,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:41,170 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:41,170 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:41,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:41,371 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:41,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:41,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 74 times [2020-09-15 01:05:41,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:41,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283998392] [2020-09-15 01:05:41,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:41,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283998392] [2020-09-15 01:05:41,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111991657] [2020-09-15 01:05:41,480 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 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 [2020-09-15 01:05:41,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:41,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:41,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:41,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:42,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:42,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:42,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446721444] [2020-09-15 01:05:42,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:42,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:42,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:42,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:42,230 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-09-15 01:05:42,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:42,630 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-09-15 01:05:42,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:05:42,631 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:42,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:42,633 INFO L225 Difference]: With dead ends: 198 [2020-09-15 01:05:42,633 INFO L226 Difference]: Without dead ends: 196 [2020-09-15 01:05:42,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:05:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-15 01:05:42,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-09-15 01:05:42,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-15 01:05:42,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-15 01:05:42,638 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-15 01:05:42,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:42,638 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-15 01:05:42,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:42,638 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-15 01:05:42,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:42,638 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:42,638 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:42,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-09-15 01:05:42,839 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:42,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:42,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 75 times [2020-09-15 01:05:42,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:42,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453497352] [2020-09-15 01:05:42,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:42,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453497352] [2020-09-15 01:05:42,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217137830] [2020-09-15 01:05:42,946 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 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 [2020-09-15 01:05:42,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:05:42,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:42,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:42,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:43,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:43,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:43,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410792150] [2020-09-15 01:05:43,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:43,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:43,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:43,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:43,204 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-15 01:05:43,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:43,742 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-09-15 01:05:43,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:05:43,743 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:43,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:43,745 INFO L225 Difference]: With dead ends: 209 [2020-09-15 01:05:43,745 INFO L226 Difference]: Without dead ends: 207 [2020-09-15 01:05:43,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:05:43,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-15 01:05:43,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-15 01:05:43,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-15 01:05:43,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-15 01:05:43,749 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-15 01:05:43,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:43,750 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-15 01:05:43,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:43,750 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-15 01:05:43,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:43,750 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:43,751 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:43,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:43,959 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:43,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:43,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 76 times [2020-09-15 01:05:43,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:43,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817006821] [2020-09-15 01:05:43,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:44,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817006821] [2020-09-15 01:05:44,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413415871] [2020-09-15 01:05:44,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-15 01:05:44,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:05:44,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:44,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:44,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:44,272 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:44,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:44,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:44,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721513948] [2020-09-15 01:05:44,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:44,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:44,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:44,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:44,317 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-15 01:05:45,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:45,030 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-09-15 01:05:45,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:05:45,031 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:45,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:45,032 INFO L225 Difference]: With dead ends: 217 [2020-09-15 01:05:45,033 INFO L226 Difference]: Without dead ends: 212 [2020-09-15 01:05:45,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:05:45,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-15 01:05:45,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-09-15 01:05:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-15 01:05:45,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-09-15 01:05:45,037 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-09-15 01:05:45,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:45,037 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-09-15 01:05:45,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:45,037 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-09-15 01:05:45,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:45,038 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:45,038 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:45,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-15 01:05:45,240 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:45,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:45,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 77 times [2020-09-15 01:05:45,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:45,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657676285] [2020-09-15 01:05:45,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:45,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657676285] [2020-09-15 01:05:45,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133623705] [2020-09-15 01:05:45,362 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 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 [2020-09-15 01:05:45,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:45,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:45,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:45,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:47,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:47,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:47,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:47,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939283309] [2020-09-15 01:05:47,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:47,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:47,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:47,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=144, Unknown=1, NotChecked=0, Total=210 [2020-09-15 01:05:47,641 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-09-15 01:05:52,039 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-15 01:05:56,293 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-15 01:05:56,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:56,807 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-09-15 01:05:56,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:05:56,808 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:56,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:56,809 INFO L225 Difference]: With dead ends: 236 [2020-09-15 01:05:56,809 INFO L226 Difference]: Without dead ends: 228 [2020-09-15 01:05:56,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=307, Invalid=684, Unknown=1, NotChecked=0, Total=992 [2020-09-15 01:05:56,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-15 01:05:56,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-09-15 01:05:56,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-15 01:05:56,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-09-15 01:05:56,813 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-09-15 01:05:56,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:56,813 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-09-15 01:05:56,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:56,813 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-09-15 01:05:56,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:56,814 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:56,814 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:57,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-09-15 01:05:57,022 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:57,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:57,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 78 times [2020-09-15 01:05:57,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:57,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837826139] [2020-09-15 01:05:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:57,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837826139] [2020-09-15 01:05:57,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738207695] [2020-09-15 01:05:57,127 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 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 [2020-09-15 01:05:57,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:05:57,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:57,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:57,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:57,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:57,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:05:57,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:57,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:57,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:57,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631371213] [2020-09-15 01:05:57,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:57,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:57,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:57,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:57,385 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-09-15 01:05:58,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:58,104 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-09-15 01:05:58,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:05:58,105 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:58,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:58,106 INFO L225 Difference]: With dead ends: 219 [2020-09-15 01:05:58,106 INFO L226 Difference]: Without dead ends: 214 [2020-09-15 01:05:58,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=277, Invalid=593, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:05:58,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-15 01:05:58,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-09-15 01:05:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-15 01:05:58,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-09-15 01:05:58,109 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-09-15 01:05:58,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:58,109 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-09-15 01:05:58,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:58,109 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-09-15 01:05:58,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:58,110 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:58,110 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:58,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-15 01:05:58,311 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:58,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:58,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 79 times [2020-09-15 01:05:58,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:58,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162495140] [2020-09-15 01:05:58,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:58,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162495140] [2020-09-15 01:05:58,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609411284] [2020-09-15 01:05:58,420 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 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 [2020-09-15 01:05:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:58,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:58,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:58,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:58,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:58,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231997394] [2020-09-15 01:05:58,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:58,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:58,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:58,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:58,627 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-09-15 01:05:59,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:59,008 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-09-15 01:05:59,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:05:59,009 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:59,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:59,009 INFO L225 Difference]: With dead ends: 197 [2020-09-15 01:05:59,009 INFO L226 Difference]: Without dead ends: 195 [2020-09-15 01:05:59,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:05:59,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-15 01:05:59,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-09-15 01:05:59,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-15 01:05:59,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-09-15 01:05:59,013 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-09-15 01:05:59,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:59,013 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-09-15 01:05:59,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:59,013 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-09-15 01:05:59,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:59,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:59,014 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:59,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:59,220 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:59,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:59,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 80 times [2020-09-15 01:05:59,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:59,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507725577] [2020-09-15 01:05:59,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:59,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507725577] [2020-09-15 01:05:59,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147551020] [2020-09-15 01:05:59,327 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 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 [2020-09-15 01:05:59,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:59,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:59,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:59,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:59,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:59,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:59,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309229079] [2020-09-15 01:05:59,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:59,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:59,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:59,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:59,531 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-09-15 01:05:59,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:59,888 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-09-15 01:05:59,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:05:59,889 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:59,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:59,890 INFO L225 Difference]: With dead ends: 202 [2020-09-15 01:05:59,890 INFO L226 Difference]: Without dead ends: 200 [2020-09-15 01:05:59,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:05:59,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-15 01:05:59,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-09-15 01:05:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-15 01:05:59,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-09-15 01:05:59,895 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-09-15 01:05:59,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:59,895 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-09-15 01:05:59,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:59,895 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-09-15 01:05:59,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:59,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:59,896 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:00,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-15 01:06:00,100 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:00,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:00,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 81 times [2020-09-15 01:06:00,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:00,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120751043] [2020-09-15 01:06:00,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:00,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:00,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120751043] [2020-09-15 01:06:00,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747186492] [2020-09-15 01:06:00,207 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 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 [2020-09-15 01:06:00,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:06:00,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:00,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:00,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:00,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:00,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:00,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866074378] [2020-09-15 01:06:00,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:00,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:00,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:00,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:00,427 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-09-15 01:06:00,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:00,811 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-09-15 01:06:00,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:06:00,812 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:00,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:00,813 INFO L225 Difference]: With dead ends: 197 [2020-09-15 01:06:00,813 INFO L226 Difference]: Without dead ends: 195 [2020-09-15 01:06:00,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:06:00,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-15 01:06:00,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-09-15 01:06:00,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:06:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-09-15 01:06:00,817 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-09-15 01:06:00,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:00,817 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-09-15 01:06:00,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-09-15 01:06:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:00,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:00,818 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:01,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:01,019 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:01,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:01,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 82 times [2020-09-15 01:06:01,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:01,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270440065] [2020-09-15 01:06:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:01,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270440065] [2020-09-15 01:06:01,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442029219] [2020-09-15 01:06:01,117 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 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 [2020-09-15 01:06:01,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:06:01,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:01,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:01,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:01,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:01,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:01,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897601714] [2020-09-15 01:06:01,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:01,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:01,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:01,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:01,382 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-09-15 01:06:02,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:02,047 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-09-15 01:06:02,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:06:02,048 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:02,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:02,050 INFO L225 Difference]: With dead ends: 214 [2020-09-15 01:06:02,050 INFO L226 Difference]: Without dead ends: 212 [2020-09-15 01:06:02,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=574, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:06:02,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-15 01:06:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-09-15 01:06:02,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-15 01:06:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-09-15 01:06:02,056 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-09-15 01:06:02,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:02,056 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-09-15 01:06:02,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:02,057 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-09-15 01:06:02,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:02,057 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:02,058 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:02,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-15 01:06:02,270 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:02,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:02,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 83 times [2020-09-15 01:06:02,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:02,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531810420] [2020-09-15 01:06:02,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:02,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531810420] [2020-09-15 01:06:02,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427243723] [2020-09-15 01:06:02,411 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 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 [2020-09-15 01:06:02,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:06:02,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:02,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:02,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:02,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:02,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:02,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147841123] [2020-09-15 01:06:02,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:02,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:02,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:02,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:02,668 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-09-15 01:06:03,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:03,213 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-09-15 01:06:03,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:06:03,214 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:03,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:03,215 INFO L225 Difference]: With dead ends: 217 [2020-09-15 01:06:03,215 INFO L226 Difference]: Without dead ends: 215 [2020-09-15 01:06:03,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:06:03,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-15 01:06:03,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-09-15 01:06:03,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-15 01:06:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-15 01:06:03,221 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-15 01:06:03,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:03,221 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-15 01:06:03,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:03,222 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-15 01:06:03,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:03,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:03,222 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:03,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:03,423 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:03,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:03,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 84 times [2020-09-15 01:06:03,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:03,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643260106] [2020-09-15 01:06:03,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:03,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643260106] [2020-09-15 01:06:03,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105381336] [2020-09-15 01:06:03,533 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 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 [2020-09-15 01:06:03,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:06:03,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:03,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:03,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:03,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:03,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:03,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709154422] [2020-09-15 01:06:03,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:03,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:03,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:03,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:03,736 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-15 01:06:04,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:04,294 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-09-15 01:06:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:06:04,295 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:04,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:04,296 INFO L225 Difference]: With dead ends: 211 [2020-09-15 01:06:04,296 INFO L226 Difference]: Without dead ends: 209 [2020-09-15 01:06:04,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=559, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:06:04,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-15 01:06:04,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-09-15 01:06:04,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-15 01:06:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-15 01:06:04,300 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-15 01:06:04,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:04,301 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-15 01:06:04,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:04,301 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-15 01:06:04,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:04,301 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:04,301 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:04,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:04,502 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:04,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:04,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 85 times [2020-09-15 01:06:04,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:04,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167887034] [2020-09-15 01:06:04,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:04,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167887034] [2020-09-15 01:06:04,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167111003] [2020-09-15 01:06:04,604 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 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 [2020-09-15 01:06:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:04,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:04,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:04,804 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:06:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:04,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:04,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:04,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000079491] [2020-09-15 01:06:04,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:04,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:04,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:04,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:04,816 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-15 01:06:05,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:05,425 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-09-15 01:06:05,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:06:05,426 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:05,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:05,427 INFO L225 Difference]: With dead ends: 211 [2020-09-15 01:06:05,427 INFO L226 Difference]: Without dead ends: 206 [2020-09-15 01:06:05,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:06:05,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-15 01:06:05,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-09-15 01:06:05,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-15 01:06:05,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-15 01:06:05,430 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-15 01:06:05,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:05,430 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-15 01:06:05,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:05,430 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-15 01:06:05,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:05,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:05,431 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:05,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2020-09-15 01:06:05,632 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:05,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:05,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 86 times [2020-09-15 01:06:05,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:05,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827424463] [2020-09-15 01:06:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:05,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827424463] [2020-09-15 01:06:05,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779167115] [2020-09-15 01:06:05,756 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 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 [2020-09-15 01:06:05,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:06:05,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:05,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:05,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:05,946 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:06:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:05,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:05,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:05,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819891843] [2020-09-15 01:06:05,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:05,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:05,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:05,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:05,990 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-15 01:06:06,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:06,738 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-09-15 01:06:06,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:06:06,739 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:06,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:06,740 INFO L225 Difference]: With dead ends: 227 [2020-09-15 01:06:06,740 INFO L226 Difference]: Without dead ends: 222 [2020-09-15 01:06:06,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:06:06,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-15 01:06:06,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-09-15 01:06:06,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-15 01:06:06,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-15 01:06:06,743 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-15 01:06:06,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:06,743 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-15 01:06:06,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:06,744 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-15 01:06:06,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:06,744 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:06,744 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:06,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-15 01:06:06,945 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:06,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 87 times [2020-09-15 01:06:06,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:06,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345460011] [2020-09-15 01:06:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:07,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345460011] [2020-09-15 01:06:07,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098266319] [2020-09-15 01:06:07,053 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 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 [2020-09-15 01:06:07,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:06:07,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:07,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:07,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:07,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:07,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:07,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312862583] [2020-09-15 01:06:07,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:07,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:07,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:07,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:07,248 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-15 01:06:07,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:07,855 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-09-15 01:06:07,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:06:07,856 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:07,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:07,857 INFO L225 Difference]: With dead ends: 221 [2020-09-15 01:06:07,858 INFO L226 Difference]: Without dead ends: 219 [2020-09-15 01:06:07,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:06:07,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-15 01:06:07,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-09-15 01:06:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-15 01:06:07,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-15 01:06:07,862 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-15 01:06:07,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:07,862 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-15 01:06:07,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:07,863 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-15 01:06:07,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:07,863 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:07,863 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:08,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:08,069 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:08,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:08,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 88 times [2020-09-15 01:06:08,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:08,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045043688] [2020-09-15 01:06:08,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:08,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045043688] [2020-09-15 01:06:08,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181393051] [2020-09-15 01:06:08,194 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 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 [2020-09-15 01:06:08,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:06:08,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:08,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:08,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:08,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:06:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:08,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:08,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:08,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463460561] [2020-09-15 01:06:08,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:08,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:08,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:08,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:08,433 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-15 01:06:09,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:09,216 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-09-15 01:06:09,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:06:09,217 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:09,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:09,218 INFO L225 Difference]: With dead ends: 240 [2020-09-15 01:06:09,218 INFO L226 Difference]: Without dead ends: 232 [2020-09-15 01:06:09,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:06:09,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-15 01:06:09,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-09-15 01:06:09,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-15 01:06:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-09-15 01:06:09,223 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-09-15 01:06:09,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:09,223 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-09-15 01:06:09,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:09,223 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-09-15 01:06:09,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:09,224 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:09,224 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:09,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-15 01:06:09,429 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:09,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:09,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 89 times [2020-09-15 01:06:09,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:09,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281179937] [2020-09-15 01:06:09,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:09,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281179937] [2020-09-15 01:06:09,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233039253] [2020-09-15 01:06:09,530 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 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 [2020-09-15 01:06:09,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:06:09,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:09,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:09,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:09,701 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:06:09,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:09,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:09,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:09,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148042788] [2020-09-15 01:06:09,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:09,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:09,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:09,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:09,723 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-09-15 01:06:10,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:10,515 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-09-15 01:06:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:06:10,516 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:10,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:10,517 INFO L225 Difference]: With dead ends: 238 [2020-09-15 01:06:10,517 INFO L226 Difference]: Without dead ends: 230 [2020-09-15 01:06:10,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=357, Invalid=833, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:06:10,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-09-15 01:06:10,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-09-15 01:06:10,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:06:10,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-15 01:06:10,522 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-15 01:06:10,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:10,522 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-15 01:06:10,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:10,522 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-15 01:06:10,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:10,523 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:10,523 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:10,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-15 01:06:10,733 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:10,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:10,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 90 times [2020-09-15 01:06:10,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:10,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008184745] [2020-09-15 01:06:10,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:10,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008184745] [2020-09-15 01:06:10,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048689754] [2020-09-15 01:06:10,845 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 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 [2020-09-15 01:06:10,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:06:10,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:10,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:10,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:11,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:11,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:11,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280470889] [2020-09-15 01:06:11,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:11,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:11,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:11,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:11,069 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-15 01:06:11,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:11,438 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-09-15 01:06:11,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:06:11,439 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:11,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:11,440 INFO L225 Difference]: With dead ends: 195 [2020-09-15 01:06:11,440 INFO L226 Difference]: Without dead ends: 193 [2020-09-15 01:06:11,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:06:11,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-15 01:06:11,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-09-15 01:06:11,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:06:11,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-15 01:06:11,444 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-15 01:06:11,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:11,444 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-15 01:06:11,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:11,444 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-15 01:06:11,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:11,445 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:11,445 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:11,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-15 01:06:11,645 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:11,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:11,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 91 times [2020-09-15 01:06:11,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:11,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888234442] [2020-09-15 01:06:11,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:11,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:11,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888234442] [2020-09-15 01:06:11,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646772554] [2020-09-15 01:06:11,760 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 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 [2020-09-15 01:06:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:11,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:11,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:11,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:11,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:11,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258688833] [2020-09-15 01:06:11,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:11,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:11,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:11,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:11,977 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-15 01:06:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:12,611 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-09-15 01:06:12,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:06:12,612 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:12,613 INFO L225 Difference]: With dead ends: 206 [2020-09-15 01:06:12,613 INFO L226 Difference]: Without dead ends: 204 [2020-09-15 01:06:12,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=569, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:06:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-15 01:06:12,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-09-15 01:06:12,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-15 01:06:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-09-15 01:06:12,616 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-09-15 01:06:12,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:12,616 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-09-15 01:06:12,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:12,616 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-09-15 01:06:12,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:12,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:12,617 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:12,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:12,818 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:12,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:12,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 92 times [2020-09-15 01:06:12,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:12,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971574328] [2020-09-15 01:06:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:12,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971574328] [2020-09-15 01:06:12,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125135776] [2020-09-15 01:06:12,936 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 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 [2020-09-15 01:06:12,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:06:12,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:12,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:12,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:13,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:06:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:14,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:14,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 01:06:14,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792796164] [2020-09-15 01:06:14,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:06:14,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:14,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:06:14,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=174, Unknown=1, NotChecked=0, Total=240 [2020-09-15 01:06:14,314 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-09-15 01:06:16,881 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 25 [2020-09-15 01:06:37,081 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 29 [2020-09-15 01:07:08,391 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-09-15 01:07:31,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:31,321 INFO L93 Difference]: Finished difference Result 242 states and 573 transitions. [2020-09-15 01:07:31,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:07:31,322 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-09-15 01:07:31,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:31,323 INFO L225 Difference]: With dead ends: 242 [2020-09-15 01:07:31,323 INFO L226 Difference]: Without dead ends: 237 [2020-09-15 01:07:31,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=402, Invalid=995, Unknown=9, NotChecked=0, Total=1406 [2020-09-15 01:07:31,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-15 01:07:31,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 139. [2020-09-15 01:07:31,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-15 01:07:31,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-09-15 01:07:31,325 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-09-15 01:07:31,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:31,326 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-09-15 01:07:31,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:07:31,326 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-09-15 01:07:31,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:31,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:31,326 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:31,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-15 01:07:31,527 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:31,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:31,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 93 times [2020-09-15 01:07:31,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:31,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340152036] [2020-09-15 01:07:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:31,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340152036] [2020-09-15 01:07:31,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745499132] [2020-09-15 01:07:31,648 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 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 [2020-09-15 01:07:31,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:07:31,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:31,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:31,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:31,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:31,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:31,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814137284] [2020-09-15 01:07:31,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:31,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:31,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:31,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:31,878 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-09-15 01:07:32,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:32,283 INFO L93 Difference]: Finished difference Result 192 states and 445 transitions. [2020-09-15 01:07:32,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:07:32,284 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:32,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:32,285 INFO L225 Difference]: With dead ends: 192 [2020-09-15 01:07:32,285 INFO L226 Difference]: Without dead ends: 190 [2020-09-15 01:07:32,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:07:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-15 01:07:32,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 141. [2020-09-15 01:07:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-15 01:07:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-09-15 01:07:32,289 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-09-15 01:07:32,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:32,289 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-09-15 01:07:32,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:32,289 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-09-15 01:07:32,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:32,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:32,289 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:32,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-09-15 01:07:32,490 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:32,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:32,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 94 times [2020-09-15 01:07:32,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:32,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092841136] [2020-09-15 01:07:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:32,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092841136] [2020-09-15 01:07:32,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391014839] [2020-09-15 01:07:32,604 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 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 [2020-09-15 01:07:32,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:07:32,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:32,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:32,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:32,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:32,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:32,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119247933] [2020-09-15 01:07:32,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:32,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:32,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:32,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:32,842 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-09-15 01:07:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:33,270 INFO L93 Difference]: Finished difference Result 203 states and 467 transitions. [2020-09-15 01:07:33,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:07:33,271 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:33,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:33,271 INFO L225 Difference]: With dead ends: 203 [2020-09-15 01:07:33,272 INFO L226 Difference]: Without dead ends: 201 [2020-09-15 01:07:33,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:07:33,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-15 01:07:33,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 142. [2020-09-15 01:07:33,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:07:33,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-09-15 01:07:33,275 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-09-15 01:07:33,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:33,275 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-09-15 01:07:33,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:33,275 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-09-15 01:07:33,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:33,276 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:33,276 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:33,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:33,477 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 95 times [2020-09-15 01:07:33,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:33,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422700202] [2020-09-15 01:07:33,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:33,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422700202] [2020-09-15 01:07:33,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773897793] [2020-09-15 01:07:33,591 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 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 [2020-09-15 01:07:33,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:07:33,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:33,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:33,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:33,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:33,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:33,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650973228] [2020-09-15 01:07:33,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:33,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:33,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:33,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:33,805 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-09-15 01:07:34,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:34,180 INFO L93 Difference]: Finished difference Result 194 states and 452 transitions. [2020-09-15 01:07:34,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:07:34,181 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:34,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:34,182 INFO L225 Difference]: With dead ends: 194 [2020-09-15 01:07:34,182 INFO L226 Difference]: Without dead ends: 192 [2020-09-15 01:07:34,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:07:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-15 01:07:34,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 137. [2020-09-15 01:07:34,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-15 01:07:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-09-15 01:07:34,186 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-09-15 01:07:34,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:34,187 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-09-15 01:07:34,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:34,187 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-09-15 01:07:34,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:34,188 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:34,188 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:34,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:34,399 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:34,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:34,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 96 times [2020-09-15 01:07:34,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:34,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549306844] [2020-09-15 01:07:34,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:34,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549306844] [2020-09-15 01:07:34,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040689162] [2020-09-15 01:07:34,515 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 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 [2020-09-15 01:07:34,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:07:34,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:34,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:34,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:34,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:34,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:34,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:34,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623559487] [2020-09-15 01:07:34,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:34,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:34,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:34,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:34,740 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-09-15 01:07:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:35,402 INFO L93 Difference]: Finished difference Result 210 states and 483 transitions. [2020-09-15 01:07:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:07:35,403 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:35,404 INFO L225 Difference]: With dead ends: 210 [2020-09-15 01:07:35,404 INFO L226 Difference]: Without dead ends: 208 [2020-09-15 01:07:35,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:07:35,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-15 01:07:35,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 140. [2020-09-15 01:07:35,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-15 01:07:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-09-15 01:07:35,409 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-09-15 01:07:35,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:35,409 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-09-15 01:07:35,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:35,409 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-09-15 01:07:35,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:35,409 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:35,410 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:35,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:35,621 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:35,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:35,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 97 times [2020-09-15 01:07:35,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:35,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531215995] [2020-09-15 01:07:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:35,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531215995] [2020-09-15 01:07:35,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633563095] [2020-09-15 01:07:35,736 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 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 [2020-09-15 01:07:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:35,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:35,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:35,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:35,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:35,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452424885] [2020-09-15 01:07:35,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:35,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:35,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:35,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:35,962 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-09-15 01:07:36,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:36,613 INFO L93 Difference]: Finished difference Result 219 states and 501 transitions. [2020-09-15 01:07:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:07:36,614 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:36,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:36,615 INFO L225 Difference]: With dead ends: 219 [2020-09-15 01:07:36,615 INFO L226 Difference]: Without dead ends: 217 [2020-09-15 01:07:36,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=246, Invalid=624, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:07:36,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-15 01:07:36,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 140. [2020-09-15 01:07:36,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-15 01:07:36,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-09-15 01:07:36,618 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-09-15 01:07:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:36,618 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-09-15 01:07:36,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:36,619 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-09-15 01:07:36,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:36,619 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:36,619 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:36,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:36,820 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:36,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:36,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 98 times [2020-09-15 01:07:36,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:36,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151613114] [2020-09-15 01:07:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:36,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151613114] [2020-09-15 01:07:36,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537376886] [2020-09-15 01:07:36,937 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 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 [2020-09-15 01:07:36,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:07:36,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:36,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:36,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:37,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:37,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:37,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566487117] [2020-09-15 01:07:37,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:37,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:37,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:37,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:37,145 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-09-15 01:07:37,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:37,715 INFO L93 Difference]: Finished difference Result 196 states and 455 transitions. [2020-09-15 01:07:37,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:07:37,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:37,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:37,717 INFO L225 Difference]: With dead ends: 196 [2020-09-15 01:07:37,717 INFO L226 Difference]: Without dead ends: 194 [2020-09-15 01:07:37,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:07:37,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-15 01:07:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 139. [2020-09-15 01:07:37,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-15 01:07:37,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-15 01:07:37,721 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-15 01:07:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:37,721 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-15 01:07:37,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:37,722 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-15 01:07:37,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:37,722 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:37,722 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:37,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-15 01:07:37,923 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:37,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:37,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 99 times [2020-09-15 01:07:37,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:37,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195332778] [2020-09-15 01:07:37,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:38,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195332778] [2020-09-15 01:07:38,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587314805] [2020-09-15 01:07:38,038 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 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 [2020-09-15 01:07:38,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:07:38,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:38,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:38,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:38,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:38,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:38,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273730405] [2020-09-15 01:07:38,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:38,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:38,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:38,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:38,254 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-09-15 01:07:39,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:39,031 INFO L93 Difference]: Finished difference Result 211 states and 490 transitions. [2020-09-15 01:07:39,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:07:39,033 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:39,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:39,033 INFO L225 Difference]: With dead ends: 211 [2020-09-15 01:07:39,034 INFO L226 Difference]: Without dead ends: 209 [2020-09-15 01:07:39,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=337, Invalid=785, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:07:39,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-15 01:07:39,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 141. [2020-09-15 01:07:39,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-15 01:07:39,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-09-15 01:07:39,037 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-09-15 01:07:39,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:39,037 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-09-15 01:07:39,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:39,037 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-09-15 01:07:39,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:39,038 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:39,038 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:39,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-15 01:07:39,239 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:39,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:39,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 100 times [2020-09-15 01:07:39,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:39,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117074657] [2020-09-15 01:07:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:39,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117074657] [2020-09-15 01:07:39,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203456671] [2020-09-15 01:07:39,357 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 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 [2020-09-15 01:07:39,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:07:39,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:39,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:39,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:39,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:39,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:39,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278116075] [2020-09-15 01:07:39,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:39,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:39,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:39,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:39,595 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-09-15 01:07:40,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:40,332 INFO L93 Difference]: Finished difference Result 215 states and 498 transitions. [2020-09-15 01:07:40,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:07:40,333 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:40,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:40,334 INFO L225 Difference]: With dead ends: 215 [2020-09-15 01:07:40,334 INFO L226 Difference]: Without dead ends: 213 [2020-09-15 01:07:40,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=754, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:07:40,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-15 01:07:40,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-09-15 01:07:40,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:07:40,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-15 01:07:40,338 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-15 01:07:40,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:40,338 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-15 01:07:40,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:40,339 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-15 01:07:40,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:40,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:40,339 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:40,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-15 01:07:40,540 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:40,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:40,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 101 times [2020-09-15 01:07:40,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:40,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624594927] [2020-09-15 01:07:40,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:40,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624594927] [2020-09-15 01:07:40,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839600831] [2020-09-15 01:07:40,658 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 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 [2020-09-15 01:07:40,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:07:40,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:40,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:40,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:40,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:40,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:40,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32689495] [2020-09-15 01:07:40,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:40,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:40,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:40,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:40,875 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-15 01:07:41,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:41,661 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-15 01:07:41,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:07:41,662 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:41,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:41,663 INFO L225 Difference]: With dead ends: 202 [2020-09-15 01:07:41,663 INFO L226 Difference]: Without dead ends: 200 [2020-09-15 01:07:41,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:07:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-15 01:07:41,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 144. [2020-09-15 01:07:41,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-15 01:07:41,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-15 01:07:41,668 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-15 01:07:41,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:41,668 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-15 01:07:41,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:41,668 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-15 01:07:41,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:41,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:41,669 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:41,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:41,879 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:41,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 102 times [2020-09-15 01:07:41,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:41,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157107306] [2020-09-15 01:07:41,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:41,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157107306] [2020-09-15 01:07:41,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61499879] [2020-09-15 01:07:41,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-15 01:07:42,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:07:42,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:42,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:42,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:42,183 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:07:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:42,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:42,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:42,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806511815] [2020-09-15 01:07:42,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:42,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:42,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:42,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:42,196 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-15 01:07:42,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:42,930 INFO L93 Difference]: Finished difference Result 196 states and 472 transitions. [2020-09-15 01:07:42,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:07:42,931 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:42,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:42,933 INFO L225 Difference]: With dead ends: 196 [2020-09-15 01:07:42,933 INFO L226 Difference]: Without dead ends: 191 [2020-09-15 01:07:42,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=382, Invalid=808, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:07:42,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-15 01:07:42,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 144. [2020-09-15 01:07:42,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-15 01:07:42,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-15 01:07:42,936 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-15 01:07:42,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:42,937 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-15 01:07:42,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:42,937 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-15 01:07:42,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:42,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:42,938 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:43,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-15 01:07:43,139 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:43,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:43,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 103 times [2020-09-15 01:07:43,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:43,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512387627] [2020-09-15 01:07:43,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:43,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512387627] [2020-09-15 01:07:43,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513525240] [2020-09-15 01:07:43,247 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 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 [2020-09-15 01:07:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:43,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:43,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:43,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:07:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:43,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:43,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:43,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448562835] [2020-09-15 01:07:43,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:43,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:43,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:43,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:43,489 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-15 01:07:44,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:44,520 INFO L93 Difference]: Finished difference Result 227 states and 547 transitions. [2020-09-15 01:07:44,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:07:44,521 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:44,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:44,522 INFO L225 Difference]: With dead ends: 227 [2020-09-15 01:07:44,522 INFO L226 Difference]: Without dead ends: 222 [2020-09-15 01:07:44,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=413, Invalid=993, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:07:44,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-15 01:07:44,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 142. [2020-09-15 01:07:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:07:44,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-15 01:07:44,526 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-15 01:07:44,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:44,527 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-15 01:07:44,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:44,527 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-15 01:07:44,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:44,527 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:44,528 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:44,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:44,730 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:44,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:44,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 104 times [2020-09-15 01:07:44,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:44,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041542988] [2020-09-15 01:07:44,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:44,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041542988] [2020-09-15 01:07:44,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590376075] [2020-09-15 01:07:44,852 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 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 [2020-09-15 01:07:44,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:07:44,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:44,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:44,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:45,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:45,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:45,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638222495] [2020-09-15 01:07:45,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:45,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:45,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:45,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:45,077 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-15 01:07:45,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:45,959 INFO L93 Difference]: Finished difference Result 226 states and 535 transitions. [2020-09-15 01:07:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:07:45,960 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:45,961 INFO L225 Difference]: With dead ends: 226 [2020-09-15 01:07:45,961 INFO L226 Difference]: Without dead ends: 224 [2020-09-15 01:07:45,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=356, Invalid=904, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:07:45,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-15 01:07:45,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 144. [2020-09-15 01:07:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-15 01:07:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-15 01:07:45,964 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-15 01:07:45,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:45,965 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-15 01:07:45,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:45,965 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-15 01:07:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:45,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:45,965 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:46,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-15 01:07:46,166 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:46,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:46,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 105 times [2020-09-15 01:07:46,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:46,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444818289] [2020-09-15 01:07:46,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:46,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444818289] [2020-09-15 01:07:46,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596838992] [2020-09-15 01:07:46,288 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 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 [2020-09-15 01:07:46,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:07:46,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:46,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:46,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:46,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:07:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:46,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:46,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:46,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450329941] [2020-09-15 01:07:46,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:46,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:46,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:46,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:46,538 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-15 01:07:47,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:47,761 INFO L93 Difference]: Finished difference Result 247 states and 597 transitions. [2020-09-15 01:07:47,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:07:47,762 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:47,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:47,763 INFO L225 Difference]: With dead ends: 247 [2020-09-15 01:07:47,763 INFO L226 Difference]: Without dead ends: 239 [2020-09-15 01:07:47,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=448, Invalid=1034, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:07:47,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-15 01:07:47,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 146. [2020-09-15 01:07:47,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-15 01:07:47,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-09-15 01:07:47,767 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-09-15 01:07:47,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:47,767 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-09-15 01:07:47,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:47,768 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-09-15 01:07:47,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:47,768 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:47,768 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:47,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:47,977 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:47,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:47,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 106 times [2020-09-15 01:07:47,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:47,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394171832] [2020-09-15 01:07:47,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:48,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394171832] [2020-09-15 01:07:48,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127495589] [2020-09-15 01:07:48,105 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 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 [2020-09-15 01:07:48,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:07:48,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:48,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:48,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:48,303 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:07:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:48,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:48,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:48,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210053789] [2020-09-15 01:07:48,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:48,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:48,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:48,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:48,331 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-09-15 01:07:49,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:49,520 INFO L93 Difference]: Finished difference Result 246 states and 590 transitions. [2020-09-15 01:07:49,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:07:49,521 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:49,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:49,522 INFO L225 Difference]: With dead ends: 246 [2020-09-15 01:07:49,523 INFO L226 Difference]: Without dead ends: 238 [2020-09-15 01:07:49,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=426, Invalid=1056, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:07:49,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-15 01:07:49,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-09-15 01:07:49,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-15 01:07:49,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-09-15 01:07:49,527 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-09-15 01:07:49,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:49,527 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-09-15 01:07:49,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:49,528 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-09-15 01:07:49,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:49,528 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:49,528 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:49,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2020-09-15 01:07:49,739 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:49,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:49,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 107 times [2020-09-15 01:07:49,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:49,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114786517] [2020-09-15 01:07:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:49,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:49,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114786517] [2020-09-15 01:07:49,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037265527] [2020-09-15 01:07:49,853 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 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 [2020-09-15 01:07:49,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:07:49,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:49,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:49,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:50,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:50,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:50,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559526820] [2020-09-15 01:07:50,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:50,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:50,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:50,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:50,059 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-09-15 01:07:50,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:50,750 INFO L93 Difference]: Finished difference Result 209 states and 489 transitions. [2020-09-15 01:07:50,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:07:50,751 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:50,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:50,752 INFO L225 Difference]: With dead ends: 209 [2020-09-15 01:07:50,752 INFO L226 Difference]: Without dead ends: 207 [2020-09-15 01:07:50,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:07:50,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-15 01:07:50,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 136. [2020-09-15 01:07:50,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-15 01:07:50,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-09-15 01:07:50,756 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-09-15 01:07:50,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:50,756 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-09-15 01:07:50,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:50,756 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-09-15 01:07:50,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:50,757 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:50,757 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:50,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:50,958 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:50,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:50,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 108 times [2020-09-15 01:07:50,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:50,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895307519] [2020-09-15 01:07:50,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:51,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895307519] [2020-09-15 01:07:51,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260822423] [2020-09-15 01:07:51,073 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 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 [2020-09-15 01:07:51,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:07:51,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:51,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:51,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:51,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:51,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:51,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444932254] [2020-09-15 01:07:51,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:51,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:51,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:51,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:51,294 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-09-15 01:07:52,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:52,158 INFO L93 Difference]: Finished difference Result 205 states and 487 transitions. [2020-09-15 01:07:52,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:07:52,159 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:52,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:52,160 INFO L225 Difference]: With dead ends: 205 [2020-09-15 01:07:52,160 INFO L226 Difference]: Without dead ends: 203 [2020-09-15 01:07:52,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=329, Invalid=793, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:07:52,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-15 01:07:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 137. [2020-09-15 01:07:52,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-15 01:07:52,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-15 01:07:52,163 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-15 01:07:52,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:52,163 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-15 01:07:52,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:52,163 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-15 01:07:52,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:52,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:52,164 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:52,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-15 01:07:52,365 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:52,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:52,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 109 times [2020-09-15 01:07:52,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:52,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523893558] [2020-09-15 01:07:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:52,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523893558] [2020-09-15 01:07:52,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537626256] [2020-09-15 01:07:52,495 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 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 [2020-09-15 01:07:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:52,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:52,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:52,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:07:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:52,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:52,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:52,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90511011] [2020-09-15 01:07:52,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:52,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:52,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:52,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:52,709 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-15 01:07:53,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:53,906 INFO L93 Difference]: Finished difference Result 228 states and 547 transitions. [2020-09-15 01:07:53,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:07:53,907 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:53,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:53,908 INFO L225 Difference]: With dead ends: 228 [2020-09-15 01:07:53,908 INFO L226 Difference]: Without dead ends: 220 [2020-09-15 01:07:53,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=520, Invalid=1286, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:07:53,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-15 01:07:53,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 137. [2020-09-15 01:07:53,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-15 01:07:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-15 01:07:53,911 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-15 01:07:53,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:53,911 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-15 01:07:53,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:53,912 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-15 01:07:53,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:53,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:53,912 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:54,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-09-15 01:07:54,113 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:54,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:54,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 110 times [2020-09-15 01:07:54,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:54,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477369692] [2020-09-15 01:07:54,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:54,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477369692] [2020-09-15 01:07:54,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178051243] [2020-09-15 01:07:54,231 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 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 [2020-09-15 01:07:54,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:07:54,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:54,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:54,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:54,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:07:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:54,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:54,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:54,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323254281] [2020-09-15 01:07:54,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:54,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:54,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:54,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:54,461 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-15 01:07:55,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:55,433 INFO L93 Difference]: Finished difference Result 228 states and 550 transitions. [2020-09-15 01:07:55,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:07:55,434 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:55,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:55,435 INFO L225 Difference]: With dead ends: 228 [2020-09-15 01:07:55,435 INFO L226 Difference]: Without dead ends: 220 [2020-09-15 01:07:55,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:07:55,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-15 01:07:55,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 133. [2020-09-15 01:07:55,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-15 01:07:55,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-09-15 01:07:55,439 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-09-15 01:07:55,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:55,439 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-09-15 01:07:55,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:55,439 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-09-15 01:07:55,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:55,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:55,440 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:55,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-15 01:07:55,647 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:55,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:55,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 111 times [2020-09-15 01:07:55,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:55,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404207803] [2020-09-15 01:07:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:55,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404207803] [2020-09-15 01:07:55,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490712873] [2020-09-15 01:07:55,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-15 01:07:55,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:07:55,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:55,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:55,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:55,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:07:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:55,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:55,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:55,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658281511] [2020-09-15 01:07:55,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:55,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:55,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:55,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:55,987 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-09-15 01:07:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:57,104 INFO L93 Difference]: Finished difference Result 224 states and 533 transitions. [2020-09-15 01:07:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:07:57,105 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:57,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:57,106 INFO L225 Difference]: With dead ends: 224 [2020-09-15 01:07:57,106 INFO L226 Difference]: Without dead ends: 216 [2020-09-15 01:07:57,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=403, Invalid=1003, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:07:57,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-15 01:07:57,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 130. [2020-09-15 01:07:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-15 01:07:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-09-15 01:07:57,111 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-09-15 01:07:57,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:57,111 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-09-15 01:07:57,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:57,111 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-09-15 01:07:57,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:57,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:57,112 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:57,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:57,313 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:57,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:57,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-09-15 01:07:57,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:57,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203770481] [2020-09-15 01:07:57,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:57,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203770481] [2020-09-15 01:07:57,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041412327] [2020-09-15 01:07:57,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:57,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:07:57,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:57,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:07:57,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:57,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:07:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:57,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:57,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-15 01:07:57,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882003211] [2020-09-15 01:07:57,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:07:57,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:57,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:07:57,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:07:57,799 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-09-15 01:07:58,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:58,140 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-09-15 01:07:58,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:07:58,142 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-09-15 01:07:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:58,143 INFO L225 Difference]: With dead ends: 185 [2020-09-15 01:07:58,144 INFO L226 Difference]: Without dead ends: 180 [2020-09-15 01:07:58,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:07:58,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-15 01:07:58,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-09-15 01:07:58,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-15 01:07:58,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-15 01:07:58,149 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-15 01:07:58,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:58,149 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-15 01:07:58,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:07:58,150 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-15 01:07:58,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:58,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:58,150 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:58,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:58,364 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:58,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:58,365 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-09-15 01:07:58,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:58,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652393912] [2020-09-15 01:07:58,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:58,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652393912] [2020-09-15 01:07:58,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547515740] [2020-09-15 01:07:58,544 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 [2020-09-15 01:07:58,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 01:07:58,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:58,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:07:58,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:58,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:58,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:07:58,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453659079] [2020-09-15 01:07:58,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:07:58,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:58,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:07:58,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:07:58,820 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-09-15 01:07:59,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:59,146 INFO L93 Difference]: Finished difference Result 186 states and 435 transitions. [2020-09-15 01:07:59,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:07:59,147 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-15 01:07:59,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:59,148 INFO L225 Difference]: With dead ends: 186 [2020-09-15 01:07:59,148 INFO L226 Difference]: Without dead ends: 183 [2020-09-15 01:07:59,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:07:59,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-15 01:07:59,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 148. [2020-09-15 01:07:59,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-15 01:07:59,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-15 01:07:59,151 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-15 01:07:59,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:59,151 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-15 01:07:59,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:07:59,152 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-15 01:07:59,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:59,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:59,152 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:59,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-09-15 01:07:59,353 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:59,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:59,353 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-09-15 01:07:59,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:59,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218986440] [2020-09-15 01:07:59,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:59,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218986440] [2020-09-15 01:07:59,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231120590] [2020-09-15 01:07:59,499 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 [2020-09-15 01:07:59,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:07:59,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:59,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:07:59,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:59,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:59,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:07:59,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884867129] [2020-09-15 01:07:59,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:07:59,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:59,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:07:59,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:07:59,801 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-15 01:08:00,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:00,232 INFO L93 Difference]: Finished difference Result 203 states and 468 transitions. [2020-09-15 01:08:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:08:00,234 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-15 01:08:00,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:00,235 INFO L225 Difference]: With dead ends: 203 [2020-09-15 01:08:00,235 INFO L226 Difference]: Without dead ends: 200 [2020-09-15 01:08:00,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:08:00,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-15 01:08:00,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 148. [2020-09-15 01:08:00,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-15 01:08:00,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-15 01:08:00,238 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-15 01:08:00,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:00,238 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-15 01:08:00,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:00,238 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-15 01:08:00,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:08:00,239 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:00,239 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:00,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-15 01:08:00,440 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:00,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:00,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-09-15 01:08:00,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:00,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987047917] [2020-09-15 01:08:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:00,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987047917] [2020-09-15 01:08:00,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235576451] [2020-09-15 01:08:00,581 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 [2020-09-15 01:08:00,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:08:00,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:00,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:00,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:00,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:00,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:00,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072052658] [2020-09-15 01:08:00,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:00,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:00,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:00,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:00,947 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-15 01:08:01,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:01,628 INFO L93 Difference]: Finished difference Result 211 states and 486 transitions. [2020-09-15 01:08:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:08:01,629 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-15 01:08:01,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:01,630 INFO L225 Difference]: With dead ends: 211 [2020-09-15 01:08:01,631 INFO L226 Difference]: Without dead ends: 208 [2020-09-15 01:08:01,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:08:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-15 01:08:01,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 149. [2020-09-15 01:08:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-15 01:08:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-09-15 01:08:01,636 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-09-15 01:08:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:01,637 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-09-15 01:08:01,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-09-15 01:08:01,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:08:01,638 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:01,638 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:01,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:01,849 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:01,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:01,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-09-15 01:08:01,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:01,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544795020] [2020-09-15 01:08:01,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:02,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544795020] [2020-09-15 01:08:02,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082865440] [2020-09-15 01:08:02,020 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 [2020-09-15 01:08:02,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:08:02,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:02,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:02,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:02,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:02,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:02,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570646923] [2020-09-15 01:08:02,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:02,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:02,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:02,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:02,315 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-09-15 01:08:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:02,945 INFO L93 Difference]: Finished difference Result 213 states and 492 transitions. [2020-09-15 01:08:02,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:08:02,947 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-15 01:08:02,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:02,947 INFO L225 Difference]: With dead ends: 213 [2020-09-15 01:08:02,947 INFO L226 Difference]: Without dead ends: 210 [2020-09-15 01:08:02,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=716, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:08:02,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-15 01:08:02,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 150. [2020-09-15 01:08:02,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-15 01:08:02,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-09-15 01:08:02,950 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-09-15 01:08:02,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:02,950 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-09-15 01:08:02,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:02,950 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-09-15 01:08:02,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:08:02,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:02,951 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:03,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:03,152 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:03,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:03,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-09-15 01:08:03,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:03,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126308461] [2020-09-15 01:08:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:03,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126308461] [2020-09-15 01:08:03,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171079241] [2020-09-15 01:08:03,283 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 [2020-09-15 01:08:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:03,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:03,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:03,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:03,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:03,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412036919] [2020-09-15 01:08:03,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:03,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:03,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:03,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:03,534 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-09-15 01:08:04,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:04,156 INFO L93 Difference]: Finished difference Result 207 states and 482 transitions. [2020-09-15 01:08:04,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:08:04,157 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-15 01:08:04,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:04,158 INFO L225 Difference]: With dead ends: 207 [2020-09-15 01:08:04,159 INFO L226 Difference]: Without dead ends: 204 [2020-09-15 01:08:04,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:08:04,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-15 01:08:04,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 152. [2020-09-15 01:08:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-15 01:08:04,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-09-15 01:08:04,162 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-09-15 01:08:04,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:04,163 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-09-15 01:08:04,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:04,163 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-09-15 01:08:04,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:08:04,163 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:04,163 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:04,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:04,364 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:04,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:04,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-09-15 01:08:04,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:04,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233709506] [2020-09-15 01:08:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:04,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233709506] [2020-09-15 01:08:04,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701317727] [2020-09-15 01:08:04,480 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 [2020-09-15 01:08:04,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:08:04,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:04,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:04,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:04,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:04,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:04,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559995247] [2020-09-15 01:08:04,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:04,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:04,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:04,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:04,716 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-09-15 01:08:05,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:05,201 INFO L93 Difference]: Finished difference Result 197 states and 464 transitions. [2020-09-15 01:08:05,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:08:05,208 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-15 01:08:05,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:05,209 INFO L225 Difference]: With dead ends: 197 [2020-09-15 01:08:05,209 INFO L226 Difference]: Without dead ends: 194 [2020-09-15 01:08:05,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:08:05,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-15 01:08:05,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 154. [2020-09-15 01:08:05,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-15 01:08:05,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-09-15 01:08:05,213 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-09-15 01:08:05,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:05,213 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-09-15 01:08:05,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:05,213 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-09-15 01:08:05,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:08:05,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:05,214 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:05,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2020-09-15 01:08:05,424 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:05,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:05,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-09-15 01:08:05,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:05,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816289965] [2020-09-15 01:08:05,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:05,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816289965] [2020-09-15 01:08:05,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740772970] [2020-09-15 01:08:05,554 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 [2020-09-15 01:08:05,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 01:08:05,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:05,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:05,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:05,763 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:08:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:05,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:05,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:05,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446954970] [2020-09-15 01:08:05,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:05,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:05,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:05,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:05,782 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-09-15 01:08:06,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:06,367 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-15 01:08:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:08:06,368 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-15 01:08:06,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:06,369 INFO L225 Difference]: With dead ends: 202 [2020-09-15 01:08:06,369 INFO L226 Difference]: Without dead ends: 196 [2020-09-15 01:08:06,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:08:06,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-15 01:08:06,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-09-15 01:08:06,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-15 01:08:06,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-09-15 01:08:06,372 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-09-15 01:08:06,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:06,372 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-09-15 01:08:06,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:06,373 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-09-15 01:08:06,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:06,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:06,373 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:06,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-09-15 01:08:06,574 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:06,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:06,574 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 112 times [2020-09-15 01:08:06,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:06,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568308757] [2020-09-15 01:08:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:06,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568308757] [2020-09-15 01:08:06,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008795519] [2020-09-15 01:08:06,723 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 [2020-09-15 01:08:06,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:08:06,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:06,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:06,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:07,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:07,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:07,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539126649] [2020-09-15 01:08:07,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:07,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:07,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:07,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:07,026 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-09-15 01:08:07,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:07,121 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-09-15 01:08:07,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:08:07,122 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:07,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:07,122 INFO L225 Difference]: With dead ends: 188 [2020-09-15 01:08:07,123 INFO L226 Difference]: Without dead ends: 186 [2020-09-15 01:08:07,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:07,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-15 01:08:07,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-09-15 01:08:07,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-15 01:08:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-09-15 01:08:07,126 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-09-15 01:08:07,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:07,127 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-09-15 01:08:07,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:07,127 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-09-15 01:08:07,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:07,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:07,127 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:07,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-15 01:08:07,328 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:07,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:07,329 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 113 times [2020-09-15 01:08:07,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:07,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479016800] [2020-09-15 01:08:07,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:07,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479016800] [2020-09-15 01:08:07,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513732699] [2020-09-15 01:08:07,493 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 [2020-09-15 01:08:07,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:08:07,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:07,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:07,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:07,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:07,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:07,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:07,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852378579] [2020-09-15 01:08:07,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:07,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:07,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:07,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:07,762 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-09-15 01:08:07,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:07,911 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-09-15 01:08:07,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:08:07,912 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:07,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:07,913 INFO L225 Difference]: With dead ends: 199 [2020-09-15 01:08:07,913 INFO L226 Difference]: Without dead ends: 197 [2020-09-15 01:08:07,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:08:07,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-15 01:08:07,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-09-15 01:08:07,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-15 01:08:07,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-15 01:08:07,917 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-15 01:08:07,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:07,917 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-15 01:08:07,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:07,917 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-15 01:08:07,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:07,918 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:07,918 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:08,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-15 01:08:08,119 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:08,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:08,119 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 114 times [2020-09-15 01:08:08,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:08,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304748509] [2020-09-15 01:08:08,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:08,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304748509] [2020-09-15 01:08:08,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817168133] [2020-09-15 01:08:08,274 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 [2020-09-15 01:08:08,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:08:08,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:08,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:08,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:08,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:08,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:08,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455590380] [2020-09-15 01:08:08,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:08,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:08,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:08,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:08,586 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-15 01:08:08,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:08,849 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-15 01:08:08,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:08:08,850 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:08,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:08,850 INFO L225 Difference]: With dead ends: 210 [2020-09-15 01:08:08,851 INFO L226 Difference]: Without dead ends: 208 [2020-09-15 01:08:08,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:08:08,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-15 01:08:08,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-09-15 01:08:08,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-15 01:08:08,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-09-15 01:08:08,854 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-09-15 01:08:08,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:08,854 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-09-15 01:08:08,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:08,854 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-09-15 01:08:08,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:08,855 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:08,855 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:09,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-15 01:08:09,056 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:09,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:09,056 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 115 times [2020-09-15 01:08:09,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:09,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291504561] [2020-09-15 01:08:09,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:09,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291504561] [2020-09-15 01:08:09,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281260461] [2020-09-15 01:08:09,210 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 [2020-09-15 01:08:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:09,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:09,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:11,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:11,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:11,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351835960] [2020-09-15 01:08:11,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:11,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:11,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:11,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:11,872 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-09-15 01:08:12,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:12,218 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-15 01:08:12,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:08:12,219 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:12,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:12,220 INFO L225 Difference]: With dead ends: 210 [2020-09-15 01:08:12,220 INFO L226 Difference]: Without dead ends: 208 [2020-09-15 01:08:12,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:08:12,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-15 01:08:12,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-09-15 01:08:12,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-15 01:08:12,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-15 01:08:12,224 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-15 01:08:12,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:12,224 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-15 01:08:12,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:12,224 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-15 01:08:12,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:12,224 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:12,224 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:12,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-15 01:08:12,425 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:12,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:12,426 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 116 times [2020-09-15 01:08:12,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:12,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474176353] [2020-09-15 01:08:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:12,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474176353] [2020-09-15 01:08:12,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860021769] [2020-09-15 01:08:12,580 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 [2020-09-15 01:08:12,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:08:12,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:12,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:12,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:16,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:16,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:16,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654079744] [2020-09-15 01:08:16,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:16,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:16,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:16,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-09-15 01:08:16,668 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-15 01:08:20,882 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-15 01:08:21,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:21,148 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-15 01:08:21,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:08:21,149 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:21,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:21,150 INFO L225 Difference]: With dead ends: 218 [2020-09-15 01:08:21,150 INFO L226 Difference]: Without dead ends: 216 [2020-09-15 01:08:21,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=144, Invalid=317, Unknown=1, NotChecked=0, Total=462 [2020-09-15 01:08:21,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-15 01:08:21,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-15 01:08:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-15 01:08:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-15 01:08:21,155 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-15 01:08:21,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:21,155 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-15 01:08:21,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:21,156 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-15 01:08:21,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:21,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:21,156 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:21,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:21,359 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:21,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:21,360 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 117 times [2020-09-15 01:08:21,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:21,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800864243] [2020-09-15 01:08:21,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:21,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800864243] [2020-09-15 01:08:21,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683680280] [2020-09-15 01:08:21,521 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 [2020-09-15 01:08:21,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:08:21,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:21,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:21,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:21,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:21,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:21,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946702931] [2020-09-15 01:08:21,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:21,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:21,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:21,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:21,865 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-15 01:08:22,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:22,288 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-09-15 01:08:22,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:08:22,289 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:22,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:22,290 INFO L225 Difference]: With dead ends: 212 [2020-09-15 01:08:22,290 INFO L226 Difference]: Without dead ends: 210 [2020-09-15 01:08:22,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:08:22,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-15 01:08:22,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-09-15 01:08:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-15 01:08:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-09-15 01:08:22,292 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-09-15 01:08:22,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:22,292 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-09-15 01:08:22,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:22,293 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-09-15 01:08:22,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:22,293 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:22,293 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:22,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-15 01:08:22,494 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:22,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:22,495 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 118 times [2020-09-15 01:08:22,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:22,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350427047] [2020-09-15 01:08:22,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:22,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350427047] [2020-09-15 01:08:22,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415886487] [2020-09-15 01:08:22,652 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 [2020-09-15 01:08:22,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:08:22,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:22,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:22,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:22,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:22,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:22,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819987043] [2020-09-15 01:08:22,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:22,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:22,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:22,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:22,960 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-09-15 01:08:23,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:23,408 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-15 01:08:23,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:08:23,410 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:23,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:23,411 INFO L225 Difference]: With dead ends: 212 [2020-09-15 01:08:23,411 INFO L226 Difference]: Without dead ends: 210 [2020-09-15 01:08:23,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=418, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:08:23,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-15 01:08:23,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-09-15 01:08:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-15 01:08:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-15 01:08:23,414 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-15 01:08:23,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:23,415 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-15 01:08:23,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:23,415 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-15 01:08:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:23,415 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:23,415 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:23,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:23,616 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:23,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:23,617 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 119 times [2020-09-15 01:08:23,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:23,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667339500] [2020-09-15 01:08:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:23,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667339500] [2020-09-15 01:08:23,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193036038] [2020-09-15 01:08:23,770 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 [2020-09-15 01:08:23,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:08:23,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:23,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:23,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:24,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:24,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:24,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588932025] [2020-09-15 01:08:24,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:24,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:24,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:24,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:24,073 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-15 01:08:24,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:24,534 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-09-15 01:08:24,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:08:24,535 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:24,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:24,536 INFO L225 Difference]: With dead ends: 224 [2020-09-15 01:08:24,536 INFO L226 Difference]: Without dead ends: 222 [2020-09-15 01:08:24,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:08:24,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-15 01:08:24,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-09-15 01:08:24,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-15 01:08:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-15 01:08:24,539 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-15 01:08:24,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:24,539 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-15 01:08:24,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:24,540 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-15 01:08:24,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:24,540 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:24,540 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:24,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:24,741 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:24,741 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 120 times [2020-09-15 01:08:24,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:24,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656012176] [2020-09-15 01:08:24,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:24,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656012176] [2020-09-15 01:08:24,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273653701] [2020-09-15 01:08:24,896 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 [2020-09-15 01:08:24,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:08:24,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:24,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:24,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:25,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:25,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:25,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903404059] [2020-09-15 01:08:25,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:25,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:25,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:25,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:25,178 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-15 01:08:25,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:25,591 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-09-15 01:08:25,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:08:25,592 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:25,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:25,593 INFO L225 Difference]: With dead ends: 218 [2020-09-15 01:08:25,593 INFO L226 Difference]: Without dead ends: 216 [2020-09-15 01:08:25,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:08:25,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-15 01:08:25,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-15 01:08:25,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-15 01:08:25,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-15 01:08:25,596 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-15 01:08:25,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:25,596 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-15 01:08:25,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:25,596 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-15 01:08:25,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:25,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:25,597 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:25,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:25,800 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:25,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:25,801 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 121 times [2020-09-15 01:08:25,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:25,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542853280] [2020-09-15 01:08:25,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:25,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542853280] [2020-09-15 01:08:25,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401862457] [2020-09-15 01:08:25,961 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 [2020-09-15 01:08:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:26,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:26,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:26,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:26,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:26,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037142765] [2020-09-15 01:08:26,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:26,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:26,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:26,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:26,226 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-15 01:08:26,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:26,486 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-09-15 01:08:26,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:08:26,487 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:26,488 INFO L225 Difference]: With dead ends: 206 [2020-09-15 01:08:26,488 INFO L226 Difference]: Without dead ends: 204 [2020-09-15 01:08:26,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:08:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-15 01:08:26,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-09-15 01:08:26,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-15 01:08:26,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-09-15 01:08:26,491 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-09-15 01:08:26,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:26,492 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-09-15 01:08:26,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:26,492 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-09-15 01:08:26,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:26,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:26,493 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:26,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:26,696 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:26,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:26,697 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 122 times [2020-09-15 01:08:26,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:26,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618396045] [2020-09-15 01:08:26,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:26,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618396045] [2020-09-15 01:08:26,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53503319] [2020-09-15 01:08:26,838 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 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 [2020-09-15 01:08:26,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:08:26,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:26,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:26,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:27,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:27,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:27,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930043149] [2020-09-15 01:08:27,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:27,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:27,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:27,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:27,140 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-09-15 01:08:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:27,674 INFO L93 Difference]: Finished difference Result 210 states and 502 transitions. [2020-09-15 01:08:27,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:08:27,675 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:27,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:27,676 INFO L225 Difference]: With dead ends: 210 [2020-09-15 01:08:27,676 INFO L226 Difference]: Without dead ends: 208 [2020-09-15 01:08:27,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:08:27,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-15 01:08:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 159. [2020-09-15 01:08:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-15 01:08:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-09-15 01:08:27,680 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-09-15 01:08:27,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:27,680 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-09-15 01:08:27,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:27,680 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-09-15 01:08:27,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:27,681 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:27,681 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:27,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-15 01:08:27,882 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:27,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:27,882 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 123 times [2020-09-15 01:08:27,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:27,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711912410] [2020-09-15 01:08:27,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:28,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711912410] [2020-09-15 01:08:28,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466221456] [2020-09-15 01:08:28,033 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 [2020-09-15 01:08:28,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:08:28,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:28,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:28,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:28,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:28,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:28,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857237910] [2020-09-15 01:08:28,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:28,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:28,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:28,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:28,329 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-09-15 01:08:28,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:28,955 INFO L93 Difference]: Finished difference Result 216 states and 515 transitions. [2020-09-15 01:08:28,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:08:28,957 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:28,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:28,958 INFO L225 Difference]: With dead ends: 216 [2020-09-15 01:08:28,958 INFO L226 Difference]: Without dead ends: 214 [2020-09-15 01:08:28,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:08:28,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-15 01:08:28,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 158. [2020-09-15 01:08:28,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-15 01:08:28,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-09-15 01:08:28,964 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-09-15 01:08:28,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:28,965 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-09-15 01:08:28,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:28,965 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-09-15 01:08:28,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:28,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:28,966 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:29,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-15 01:08:29,180 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:29,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:29,181 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 124 times [2020-09-15 01:08:29,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:29,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611231144] [2020-09-15 01:08:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:29,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611231144] [2020-09-15 01:08:29,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848014712] [2020-09-15 01:08:29,346 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 [2020-09-15 01:08:29,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:08:29,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:29,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:29,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:32,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:32,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:32,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328372587] [2020-09-15 01:08:32,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:32,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:32,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:32,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:32,201 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-09-15 01:08:32,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:32,739 INFO L93 Difference]: Finished difference Result 227 states and 536 transitions. [2020-09-15 01:08:32,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:08:32,740 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:32,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:32,741 INFO L225 Difference]: With dead ends: 227 [2020-09-15 01:08:32,741 INFO L226 Difference]: Without dead ends: 225 [2020-09-15 01:08:32,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:08:32,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-15 01:08:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-09-15 01:08:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:08:32,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-09-15 01:08:32,745 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-09-15 01:08:32,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:32,745 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-09-15 01:08:32,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:32,745 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-09-15 01:08:32,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:32,745 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:32,745 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:32,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-15 01:08:32,946 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:32,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:32,947 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 125 times [2020-09-15 01:08:32,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:32,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146939429] [2020-09-15 01:08:32,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:33,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146939429] [2020-09-15 01:08:33,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483259829] [2020-09-15 01:08:33,077 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 [2020-09-15 01:08:33,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:08:33,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:33,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:33,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:33,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:33,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:33,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952056389] [2020-09-15 01:08:33,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:33,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:33,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:33,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:33,370 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-09-15 01:08:33,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:33,837 INFO L93 Difference]: Finished difference Result 219 states and 521 transitions. [2020-09-15 01:08:33,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:08:33,838 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:33,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:33,839 INFO L225 Difference]: With dead ends: 219 [2020-09-15 01:08:33,839 INFO L226 Difference]: Without dead ends: 217 [2020-09-15 01:08:33,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:08:33,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-15 01:08:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 161. [2020-09-15 01:08:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-15 01:08:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-09-15 01:08:33,842 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-09-15 01:08:33,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:33,842 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-09-15 01:08:33,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:33,842 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-09-15 01:08:33,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:33,843 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:33,843 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:34,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-15 01:08:34,044 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:34,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:34,044 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 126 times [2020-09-15 01:08:34,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:34,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503480455] [2020-09-15 01:08:34,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:34,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503480455] [2020-09-15 01:08:34,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457159098] [2020-09-15 01:08:34,187 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 [2020-09-15 01:08:34,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:08:34,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:34,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:34,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:34,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:34,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:34,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248387817] [2020-09-15 01:08:34,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:34,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:34,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:34,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:34,501 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-09-15 01:08:34,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:34,986 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-15 01:08:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:08:34,987 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:34,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:34,988 INFO L225 Difference]: With dead ends: 218 [2020-09-15 01:08:34,988 INFO L226 Difference]: Without dead ends: 216 [2020-09-15 01:08:34,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:08:34,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-15 01:08:34,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 160. [2020-09-15 01:08:34,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-15 01:08:34,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-09-15 01:08:34,991 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-09-15 01:08:34,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:34,991 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-09-15 01:08:34,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:34,991 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-09-15 01:08:34,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:34,992 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:34,992 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:35,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:35,193 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:35,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:35,193 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 127 times [2020-09-15 01:08:35,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:35,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724487285] [2020-09-15 01:08:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:35,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724487285] [2020-09-15 01:08:35,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855075774] [2020-09-15 01:08:35,335 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 [2020-09-15 01:08:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:35,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:35,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:35,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:35,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:35,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211289555] [2020-09-15 01:08:35,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:35,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:35,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:35,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:35,636 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-09-15 01:08:36,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:36,038 INFO L93 Difference]: Finished difference Result 209 states and 498 transitions. [2020-09-15 01:08:36,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:08:36,040 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:36,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:36,040 INFO L225 Difference]: With dead ends: 209 [2020-09-15 01:08:36,041 INFO L226 Difference]: Without dead ends: 207 [2020-09-15 01:08:36,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:08:36,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-15 01:08:36,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 158. [2020-09-15 01:08:36,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-15 01:08:36,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-09-15 01:08:36,044 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-09-15 01:08:36,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:36,044 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-09-15 01:08:36,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-09-15 01:08:36,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:36,044 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:36,044 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:36,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-09-15 01:08:36,245 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:36,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:36,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 128 times [2020-09-15 01:08:36,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:36,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588500221] [2020-09-15 01:08:36,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:36,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588500221] [2020-09-15 01:08:36,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763888941] [2020-09-15 01:08:36,495 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 [2020-09-15 01:08:36,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:08:36,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:36,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:36,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:36,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:36,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:36,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147918696] [2020-09-15 01:08:36,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:36,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:36,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:36,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:36,788 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-09-15 01:08:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:36,900 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-15 01:08:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:08:36,901 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:36,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:36,902 INFO L225 Difference]: With dead ends: 212 [2020-09-15 01:08:36,902 INFO L226 Difference]: Without dead ends: 210 [2020-09-15 01:08:36,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:08:36,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-15 01:08:36,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-09-15 01:08:36,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:08:36,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-09-15 01:08:36,905 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-09-15 01:08:36,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:36,905 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-09-15 01:08:36,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:36,905 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-09-15 01:08:36,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:36,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:36,906 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:37,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:37,107 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:37,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:37,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 129 times [2020-09-15 01:08:37,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:37,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420992677] [2020-09-15 01:08:37,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:37,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420992677] [2020-09-15 01:08:37,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869293563] [2020-09-15 01:08:37,308 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 [2020-09-15 01:08:37,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:08:37,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:37,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:37,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:37,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:37,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:37,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384012433] [2020-09-15 01:08:37,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:37,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:37,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:37,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:37,609 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-09-15 01:08:37,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:37,800 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-09-15 01:08:37,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:08:37,801 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:37,802 INFO L225 Difference]: With dead ends: 217 [2020-09-15 01:08:37,802 INFO L226 Difference]: Without dead ends: 215 [2020-09-15 01:08:37,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:08:37,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-15 01:08:37,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-09-15 01:08:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:08:37,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-15 01:08:37,806 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-15 01:08:37,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:37,806 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-15 01:08:37,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:37,806 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-15 01:08:37,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:37,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:37,806 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:38,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:38,007 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:38,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:38,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 130 times [2020-09-15 01:08:38,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:38,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224446998] [2020-09-15 01:08:38,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:38,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224446998] [2020-09-15 01:08:38,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815298380] [2020-09-15 01:08:38,228 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 [2020-09-15 01:08:38,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:08:38,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:38,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:38,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:38,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:38,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:38,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099296583] [2020-09-15 01:08:38,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:38,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:38,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:38,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:38,598 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-15 01:08:38,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:38,891 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-09-15 01:08:38,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:08:38,892 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:38,893 INFO L225 Difference]: With dead ends: 227 [2020-09-15 01:08:38,893 INFO L226 Difference]: Without dead ends: 225 [2020-09-15 01:08:38,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:08:38,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-15 01:08:38,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-09-15 01:08:38,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:08:38,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-09-15 01:08:38,896 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-09-15 01:08:38,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:38,896 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-09-15 01:08:38,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:38,896 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-09-15 01:08:38,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:38,897 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:38,897 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:39,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:39,097 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:39,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:39,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 131 times [2020-09-15 01:08:39,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:39,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621967419] [2020-09-15 01:08:39,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:39,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621967419] [2020-09-15 01:08:39,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422552820] [2020-09-15 01:08:39,284 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 [2020-09-15 01:08:39,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:08:39,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:39,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:39,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:40,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:40,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:40,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385653478] [2020-09-15 01:08:40,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:40,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:40,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:40,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:40,481 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-09-15 01:08:40,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:40,854 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-09-15 01:08:40,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:08:40,855 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:40,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:40,856 INFO L225 Difference]: With dead ends: 225 [2020-09-15 01:08:40,856 INFO L226 Difference]: Without dead ends: 223 [2020-09-15 01:08:40,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:08:40,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-15 01:08:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 164. [2020-09-15 01:08:40,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:08:40,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-15 01:08:40,859 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-15 01:08:40,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:40,859 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-15 01:08:40,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:40,859 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-15 01:08:40,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:40,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:40,859 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:41,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2020-09-15 01:08:41,060 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:41,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 132 times [2020-09-15 01:08:41,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:41,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489496060] [2020-09-15 01:08:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:41,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489496060] [2020-09-15 01:08:41,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434058856] [2020-09-15 01:08:41,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-15 01:08:41,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:08:41,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:41,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:41,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:46,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:46,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:46,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506294631] [2020-09-15 01:08:46,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:46,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:46,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:46,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-09-15 01:08:46,137 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-15 01:08:50,370 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-15 01:08:50,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:50,635 INFO L93 Difference]: Finished difference Result 233 states and 545 transitions. [2020-09-15 01:08:50,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:08:50,636 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:50,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:50,637 INFO L225 Difference]: With dead ends: 233 [2020-09-15 01:08:50,637 INFO L226 Difference]: Without dead ends: 231 [2020-09-15 01:08:50,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=146, Invalid=359, Unknown=1, NotChecked=0, Total=506 [2020-09-15 01:08:50,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-15 01:08:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-09-15 01:08:50,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:08:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-15 01:08:50,641 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-15 01:08:50,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:50,642 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-15 01:08:50,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:50,642 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-15 01:08:50,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:50,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:50,642 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:50,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:50,845 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:50,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:50,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 133 times [2020-09-15 01:08:50,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:50,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624787903] [2020-09-15 01:08:50,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:51,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624787903] [2020-09-15 01:08:51,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419759645] [2020-09-15 01:08:51,037 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 [2020-09-15 01:08:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:51,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:51,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:51,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:51,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:51,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094408652] [2020-09-15 01:08:51,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:51,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:51,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:51,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:51,393 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-15 01:08:51,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:51,807 INFO L93 Difference]: Finished difference Result 225 states and 533 transitions. [2020-09-15 01:08:51,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:08:51,808 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:51,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:51,809 INFO L225 Difference]: With dead ends: 225 [2020-09-15 01:08:51,809 INFO L226 Difference]: Without dead ends: 223 [2020-09-15 01:08:51,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:08:51,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-15 01:08:51,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 160. [2020-09-15 01:08:51,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-15 01:08:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-09-15 01:08:51,812 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-09-15 01:08:51,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:51,812 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-09-15 01:08:51,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:51,812 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-09-15 01:08:51,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:51,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:51,813 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:52,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-15 01:08:52,014 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:52,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:52,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 134 times [2020-09-15 01:08:52,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:52,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794117184] [2020-09-15 01:08:52,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:52,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794117184] [2020-09-15 01:08:52,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532863193] [2020-09-15 01:08:52,180 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 [2020-09-15 01:08:52,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:08:52,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:52,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:52,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:52,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:52,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:52,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726896121] [2020-09-15 01:08:52,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:52,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:52,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:52,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:52,464 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-09-15 01:08:52,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:52,913 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-09-15 01:08:52,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:08:52,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:52,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:52,915 INFO L225 Difference]: With dead ends: 225 [2020-09-15 01:08:52,915 INFO L226 Difference]: Without dead ends: 223 [2020-09-15 01:08:52,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:08:52,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-15 01:08:52,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-09-15 01:08:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:08:52,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-15 01:08:52,918 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-15 01:08:52,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:52,918 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-15 01:08:52,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:52,918 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-15 01:08:52,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:52,919 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:52,919 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:53,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:53,120 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:53,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:53,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 135 times [2020-09-15 01:08:53,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:53,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611393719] [2020-09-15 01:08:53,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:53,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611393719] [2020-09-15 01:08:53,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456553637] [2020-09-15 01:08:53,292 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 [2020-09-15 01:08:53,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:08:53,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:53,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:53,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:53,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:53,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:53,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647263708] [2020-09-15 01:08:53,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:53,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:53,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:53,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:53,566 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-15 01:08:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:54,040 INFO L93 Difference]: Finished difference Result 235 states and 549 transitions. [2020-09-15 01:08:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:08:54,041 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:54,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:54,042 INFO L225 Difference]: With dead ends: 235 [2020-09-15 01:08:54,042 INFO L226 Difference]: Without dead ends: 233 [2020-09-15 01:08:54,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:08:54,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-15 01:08:54,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-09-15 01:08:54,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:08:54,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-15 01:08:54,046 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-15 01:08:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:54,047 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-15 01:08:54,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:54,047 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-15 01:08:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:54,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:54,047 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:54,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-15 01:08:54,248 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:54,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:54,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 136 times [2020-09-15 01:08:54,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:54,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379187880] [2020-09-15 01:08:54,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:54,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379187880] [2020-09-15 01:08:54,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388288464] [2020-09-15 01:08:54,419 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 [2020-09-15 01:08:54,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:08:54,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:54,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:54,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:54,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:54,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:54,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108555167] [2020-09-15 01:08:54,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:54,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:54,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:54,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:54,691 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-15 01:08:55,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:55,117 INFO L93 Difference]: Finished difference Result 230 states and 542 transitions. [2020-09-15 01:08:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:08:55,118 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:55,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:55,119 INFO L225 Difference]: With dead ends: 230 [2020-09-15 01:08:55,119 INFO L226 Difference]: Without dead ends: 228 [2020-09-15 01:08:55,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:08:55,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-15 01:08:55,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 163. [2020-09-15 01:08:55,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:08:55,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-15 01:08:55,123 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-15 01:08:55,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:55,123 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-15 01:08:55,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-15 01:08:55,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:55,126 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:55,126 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:55,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-15 01:08:55,334 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:55,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:55,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 137 times [2020-09-15 01:08:55,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:55,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75574663] [2020-09-15 01:08:55,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:55,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75574663] [2020-09-15 01:08:55,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041474950] [2020-09-15 01:08:55,504 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 [2020-09-15 01:08:55,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:08:55,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:55,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:55,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:55,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:55,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:55,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189448063] [2020-09-15 01:08:55,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:55,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:55,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:55,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:55,773 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-15 01:08:56,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:56,093 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-09-15 01:08:56,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:08:56,094 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:56,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:56,095 INFO L225 Difference]: With dead ends: 218 [2020-09-15 01:08:56,095 INFO L226 Difference]: Without dead ends: 216 [2020-09-15 01:08:56,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:08:56,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-15 01:08:56,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-09-15 01:08:56,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-15 01:08:56,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-09-15 01:08:56,099 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-09-15 01:08:56,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:56,099 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-09-15 01:08:56,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:56,099 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-09-15 01:08:56,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:56,100 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:56,100 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:56,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:56,309 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:56,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:56,310 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 138 times [2020-09-15 01:08:56,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:56,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162923669] [2020-09-15 01:08:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:56,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162923669] [2020-09-15 01:08:56,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605990183] [2020-09-15 01:08:56,542 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 [2020-09-15 01:08:56,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:08:56,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:56,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:56,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:56,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:56,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:56,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783498078] [2020-09-15 01:08:56,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:56,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:56,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:56,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:56,816 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-09-15 01:08:56,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:56,982 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-09-15 01:08:56,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:08:56,983 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:56,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:56,984 INFO L225 Difference]: With dead ends: 208 [2020-09-15 01:08:56,984 INFO L226 Difference]: Without dead ends: 206 [2020-09-15 01:08:56,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:08:56,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-15 01:08:56,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-09-15 01:08:56,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-15 01:08:56,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-09-15 01:08:56,987 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-09-15 01:08:56,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:56,987 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-09-15 01:08:56,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:56,988 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-09-15 01:08:56,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:56,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:56,988 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:57,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:57,189 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:57,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:57,189 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 139 times [2020-09-15 01:08:57,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:57,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049921733] [2020-09-15 01:08:57,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:57,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049921733] [2020-09-15 01:08:57,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904733774] [2020-09-15 01:08:57,415 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 [2020-09-15 01:08:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:57,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:57,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:57,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:57,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:57,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667872169] [2020-09-15 01:08:57,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:57,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:57,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:57,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:57,680 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-09-15 01:08:57,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:57,895 INFO L93 Difference]: Finished difference Result 213 states and 504 transitions. [2020-09-15 01:08:57,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:08:57,897 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:57,897 INFO L225 Difference]: With dead ends: 213 [2020-09-15 01:08:57,898 INFO L226 Difference]: Without dead ends: 211 [2020-09-15 01:08:57,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:08:57,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-15 01:08:57,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 163. [2020-09-15 01:08:57,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:08:57,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-15 01:08:57,901 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-15 01:08:57,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:57,901 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-15 01:08:57,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:57,901 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-15 01:08:57,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:57,902 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:57,902 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:58,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-15 01:08:58,102 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:58,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:58,103 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 140 times [2020-09-15 01:08:58,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:58,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150272454] [2020-09-15 01:08:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:58,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150272454] [2020-09-15 01:08:58,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868158395] [2020-09-15 01:08:58,304 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 [2020-09-15 01:08:58,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:08:58,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:58,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:58,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:58,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:58,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:58,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661707752] [2020-09-15 01:08:58,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:58,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:58,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:58,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:58,653 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-15 01:08:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:58,985 INFO L93 Difference]: Finished difference Result 223 states and 524 transitions. [2020-09-15 01:08:58,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:08:58,987 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:58,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:58,987 INFO L225 Difference]: With dead ends: 223 [2020-09-15 01:08:58,988 INFO L226 Difference]: Without dead ends: 221 [2020-09-15 01:08:58,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:08:58,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-15 01:08:58,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 161. [2020-09-15 01:08:58,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-15 01:08:58,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-09-15 01:08:58,991 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-09-15 01:08:58,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:58,991 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-09-15 01:08:58,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:58,991 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-09-15 01:08:58,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:58,991 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:58,992 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:59,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:59,193 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:59,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:59,193 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 141 times [2020-09-15 01:08:59,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:59,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723910032] [2020-09-15 01:08:59,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:59,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723910032] [2020-09-15 01:08:59,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078301066] [2020-09-15 01:08:59,364 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 [2020-09-15 01:08:59,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:08:59,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:59,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:59,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:01,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:01,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:01,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:01,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286854028] [2020-09-15 01:09:01,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:01,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:01,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:01,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:01,709 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-09-15 01:09:02,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:02,141 INFO L93 Difference]: Finished difference Result 221 states and 520 transitions. [2020-09-15 01:09:02,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:09:02,142 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:02,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:02,143 INFO L225 Difference]: With dead ends: 221 [2020-09-15 01:09:02,143 INFO L226 Difference]: Without dead ends: 219 [2020-09-15 01:09:02,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:09:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-15 01:09:02,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 163. [2020-09-15 01:09:02,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:09:02,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-15 01:09:02,147 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-15 01:09:02,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:02,147 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-15 01:09:02,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:02,148 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-15 01:09:02,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:02,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:02,148 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:02,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:02,357 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:02,357 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 142 times [2020-09-15 01:09:02,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:02,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263600974] [2020-09-15 01:09:02,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:02,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263600974] [2020-09-15 01:09:02,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396440473] [2020-09-15 01:09:02,536 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 [2020-09-15 01:09:02,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:09:02,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:02,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:02,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:08,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:08,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:08,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223326046] [2020-09-15 01:09:08,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:08,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:08,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:08,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-09-15 01:09:08,441 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-15 01:09:12,704 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-15 01:09:12,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:12,997 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-09-15 01:09:12,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:09:12,998 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:12,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:12,999 INFO L225 Difference]: With dead ends: 229 [2020-09-15 01:09:12,999 INFO L226 Difference]: Without dead ends: 227 [2020-09-15 01:09:12,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=149, Invalid=402, Unknown=1, NotChecked=0, Total=552 [2020-09-15 01:09:12,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-15 01:09:13,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-09-15 01:09:13,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:09:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-09-15 01:09:13,002 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-09-15 01:09:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:13,003 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-09-15 01:09:13,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:13,003 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-09-15 01:09:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:13,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:13,003 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:13,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:13,204 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:13,204 INFO L82 PathProgramCache]: Analyzing trace with hash 576717301, now seen corresponding path program 143 times [2020-09-15 01:09:13,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:13,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947887639] [2020-09-15 01:09:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:13,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947887639] [2020-09-15 01:09:13,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592973306] [2020-09-15 01:09:13,377 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 [2020-09-15 01:09:13,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:09:13,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:13,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:13,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:13,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:13,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:13,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236215663] [2020-09-15 01:09:13,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:13,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:13,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:13,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:13,771 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-09-15 01:09:14,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:14,300 INFO L93 Difference]: Finished difference Result 221 states and 524 transitions. [2020-09-15 01:09:14,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:09:14,302 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:14,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:14,302 INFO L225 Difference]: With dead ends: 221 [2020-09-15 01:09:14,303 INFO L226 Difference]: Without dead ends: 219 [2020-09-15 01:09:14,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:09:14,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-15 01:09:14,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 160. [2020-09-15 01:09:14,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-15 01:09:14,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-09-15 01:09:14,306 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-09-15 01:09:14,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:14,306 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-09-15 01:09:14,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:14,306 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-09-15 01:09:14,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:14,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:14,307 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:14,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2020-09-15 01:09:14,508 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:14,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:14,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1212993479, now seen corresponding path program 144 times [2020-09-15 01:09:14,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:14,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122673065] [2020-09-15 01:09:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:14,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122673065] [2020-09-15 01:09:14,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909575841] [2020-09-15 01:09:14,733 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 [2020-09-15 01:09:14,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:09:14,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:14,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:14,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:15,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:15,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:15,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934036669] [2020-09-15 01:09:15,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:15,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:15,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:15,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:15,030 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-09-15 01:09:15,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:15,234 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-09-15 01:09:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:09:15,235 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:15,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:15,236 INFO L225 Difference]: With dead ends: 204 [2020-09-15 01:09:15,236 INFO L226 Difference]: Without dead ends: 202 [2020-09-15 01:09:15,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:09:15,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-15 01:09:15,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-09-15 01:09:15,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:09:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-09-15 01:09:15,240 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-09-15 01:09:15,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:15,240 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-09-15 01:09:15,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:15,240 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-09-15 01:09:15,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:15,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:15,241 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:15,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:15,442 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:15,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:15,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1212994440, now seen corresponding path program 145 times [2020-09-15 01:09:15,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:15,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430391145] [2020-09-15 01:09:15,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:15,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430391145] [2020-09-15 01:09:15,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688611228] [2020-09-15 01:09:15,637 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 [2020-09-15 01:09:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:15,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:15,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:15,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:15,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:15,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004534558] [2020-09-15 01:09:15,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:15,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:15,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:15,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:15,957 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-09-15 01:09:16,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:16,228 INFO L93 Difference]: Finished difference Result 209 states and 495 transitions. [2020-09-15 01:09:16,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:09:16,230 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:16,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:16,231 INFO L225 Difference]: With dead ends: 209 [2020-09-15 01:09:16,231 INFO L226 Difference]: Without dead ends: 207 [2020-09-15 01:09:16,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:09:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-15 01:09:16,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 162. [2020-09-15 01:09:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:09:16,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-09-15 01:09:16,234 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-09-15 01:09:16,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:16,235 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-09-15 01:09:16,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-09-15 01:09:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:16,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:16,235 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:16,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-15 01:09:16,436 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:16,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1213023270, now seen corresponding path program 146 times [2020-09-15 01:09:16,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:16,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010285432] [2020-09-15 01:09:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:16,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010285432] [2020-09-15 01:09:16,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950972131] [2020-09-15 01:09:16,625 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 [2020-09-15 01:09:16,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:09:16,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:16,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:16,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:16,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:16,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:16,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345125035] [2020-09-15 01:09:16,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:16,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:16,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:16,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:16,972 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-09-15 01:09:17,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:17,397 INFO L93 Difference]: Finished difference Result 219 states and 515 transitions. [2020-09-15 01:09:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:09:17,398 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:17,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:17,399 INFO L225 Difference]: With dead ends: 219 [2020-09-15 01:09:17,399 INFO L226 Difference]: Without dead ends: 217 [2020-09-15 01:09:17,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:09:17,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-15 01:09:17,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 161. [2020-09-15 01:09:17,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-15 01:09:17,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-09-15 01:09:17,403 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-09-15 01:09:17,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:17,403 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-09-15 01:09:17,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:17,403 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-09-15 01:09:17,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:17,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:17,404 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:17,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-15 01:09:17,604 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:17,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:17,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1233549269, now seen corresponding path program 147 times [2020-09-15 01:09:17,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:17,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127344069] [2020-09-15 01:09:17,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:17,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127344069] [2020-09-15 01:09:17,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146963677] [2020-09-15 01:09:17,806 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 [2020-09-15 01:09:17,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:09:17,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:17,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:17,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:18,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:18,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:18,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59353485] [2020-09-15 01:09:18,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:18,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:18,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:18,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:18,146 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-09-15 01:09:18,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:18,447 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-09-15 01:09:18,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:09:18,449 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:18,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:18,449 INFO L225 Difference]: With dead ends: 200 [2020-09-15 01:09:18,450 INFO L226 Difference]: Without dead ends: 198 [2020-09-15 01:09:18,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:09:18,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-09-15 01:09:18,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-09-15 01:09:18,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:09:18,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-09-15 01:09:18,454 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-09-15 01:09:18,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:18,454 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-09-15 01:09:18,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:18,455 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-09-15 01:09:18,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:18,455 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:18,455 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:18,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:18,665 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:18,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:18,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1233550230, now seen corresponding path program 148 times [2020-09-15 01:09:18,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:18,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279986202] [2020-09-15 01:09:18,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:18,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279986202] [2020-09-15 01:09:18,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408034306] [2020-09-15 01:09:18,839 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 [2020-09-15 01:09:18,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:09:18,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:18,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:18,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:19,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:19,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:19,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945500139] [2020-09-15 01:09:19,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:19,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:19,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:19,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:19,147 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-09-15 01:09:19,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:19,486 INFO L93 Difference]: Finished difference Result 205 states and 486 transitions. [2020-09-15 01:09:19,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:09:19,488 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:19,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:19,488 INFO L225 Difference]: With dead ends: 205 [2020-09-15 01:09:19,489 INFO L226 Difference]: Without dead ends: 203 [2020-09-15 01:09:19,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:09:19,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-15 01:09:19,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 162. [2020-09-15 01:09:19,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:09:19,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-09-15 01:09:19,492 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-09-15 01:09:19,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:19,492 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-09-15 01:09:19,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:19,493 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-09-15 01:09:19,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:19,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:19,493 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:19,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-15 01:09:19,694 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:19,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:19,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1234212359, now seen corresponding path program 149 times [2020-09-15 01:09:19,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:19,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163064302] [2020-09-15 01:09:19,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:19,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163064302] [2020-09-15 01:09:19,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848595305] [2020-09-15 01:09:19,870 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 [2020-09-15 01:09:19,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:09:19,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:19,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:19,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:20,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:20,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:20,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902980019] [2020-09-15 01:09:20,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:20,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:20,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:20,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:20,172 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 17 states. [2020-09-15 01:09:20,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:20,459 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-09-15 01:09:20,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:09:20,460 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:20,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:20,461 INFO L225 Difference]: With dead ends: 201 [2020-09-15 01:09:20,461 INFO L226 Difference]: Without dead ends: 199 [2020-09-15 01:09:20,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:09:20,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-15 01:09:20,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-09-15 01:09:20,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:09:20,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-15 01:09:20,464 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-15 01:09:20,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:20,464 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-15 01:09:20,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:20,464 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-15 01:09:20,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:20,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:20,465 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:20,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:20,672 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:20,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:20,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1234234679, now seen corresponding path program 150 times [2020-09-15 01:09:20,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:20,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947009468] [2020-09-15 01:09:20,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:20,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947009468] [2020-09-15 01:09:20,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420173473] [2020-09-15 01:09:20,821 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 [2020-09-15 01:09:20,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:09:20,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:20,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:20,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:21,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:09:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:21,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:21,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:21,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055470075] [2020-09-15 01:09:21,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:21,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:21,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:21,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:21,143 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-15 01:09:21,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:21,917 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-09-15 01:09:21,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:09:21,919 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:21,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:21,919 INFO L225 Difference]: With dead ends: 226 [2020-09-15 01:09:21,920 INFO L226 Difference]: Without dead ends: 221 [2020-09-15 01:09:21,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:09:21,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-15 01:09:21,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-09-15 01:09:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:09:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-09-15 01:09:21,923 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-09-15 01:09:21,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:21,923 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-09-15 01:09:21,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:21,924 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-09-15 01:09:21,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:21,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:21,924 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:22,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2020-09-15 01:09:22,125 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:22,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:22,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1234242150, now seen corresponding path program 151 times [2020-09-15 01:09:22,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:22,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779923309] [2020-09-15 01:09:22,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:22,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779923309] [2020-09-15 01:09:22,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821505374] [2020-09-15 01:09:22,299 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 [2020-09-15 01:09:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:22,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:22,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:22,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:22,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:22,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264018379] [2020-09-15 01:09:22,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:22,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:22,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:22,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:22,635 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-09-15 01:09:23,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:23,209 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-15 01:09:23,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:09:23,211 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:23,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:23,211 INFO L225 Difference]: With dead ends: 218 [2020-09-15 01:09:23,212 INFO L226 Difference]: Without dead ends: 216 [2020-09-15 01:09:23,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:09:23,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-15 01:09:23,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-09-15 01:09:23,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:09:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-15 01:09:23,215 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-15 01:09:23,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:23,215 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-15 01:09:23,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:23,216 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-15 01:09:23,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:23,216 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:23,216 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:23,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:23,417 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:23,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:23,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1234263509, now seen corresponding path program 152 times [2020-09-15 01:09:23,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:23,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958067241] [2020-09-15 01:09:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:23,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958067241] [2020-09-15 01:09:23,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415960804] [2020-09-15 01:09:23,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-15 01:09:23,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:09:23,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:23,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:23,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:23,868 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:09:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:23,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:23,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:23,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642366227] [2020-09-15 01:09:23,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:23,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:23,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:23,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:23,930 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-15 01:09:24,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:24,885 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-09-15 01:09:24,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:09:24,887 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:24,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:24,887 INFO L225 Difference]: With dead ends: 248 [2020-09-15 01:09:24,887 INFO L226 Difference]: Without dead ends: 243 [2020-09-15 01:09:24,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:09:24,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-15 01:09:24,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-09-15 01:09:24,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:09:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-15 01:09:24,891 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-15 01:09:24,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:24,892 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-15 01:09:24,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:24,892 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-15 01:09:24,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:24,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:24,892 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:25,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:25,093 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:25,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:25,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1234264470, now seen corresponding path program 153 times [2020-09-15 01:09:25,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:25,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608759415] [2020-09-15 01:09:25,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:25,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608759415] [2020-09-15 01:09:25,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464751186] [2020-09-15 01:09:25,255 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 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 [2020-09-15 01:09:25,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:09:25,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:25,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:09:25,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:25,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:25,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-09-15 01:09:25,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742175636] [2020-09-15 01:09:25,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:09:25,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:25,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:09:25,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:09:25,437 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 13 states. [2020-09-15 01:09:25,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:25,872 INFO L93 Difference]: Finished difference Result 246 states and 583 transitions. [2020-09-15 01:09:25,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:09:25,874 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2020-09-15 01:09:25,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:25,874 INFO L225 Difference]: With dead ends: 246 [2020-09-15 01:09:25,875 INFO L226 Difference]: Without dead ends: 241 [2020-09-15 01:09:25,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:09:25,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-15 01:09:25,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 162. [2020-09-15 01:09:25,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:09:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-09-15 01:09:25,878 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-09-15 01:09:25,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:25,879 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-09-15 01:09:25,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:09:25,879 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-09-15 01:09:25,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:25,879 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:25,879 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:26,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:26,080 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:26,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:26,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1234472790, now seen corresponding path program 154 times [2020-09-15 01:09:26,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:26,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060692357] [2020-09-15 01:09:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:26,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060692357] [2020-09-15 01:09:26,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516001484] [2020-09-15 01:09:26,236 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 [2020-09-15 01:09:26,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:09:26,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:26,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:26,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:26,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:26,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:26,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148621965] [2020-09-15 01:09:26,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:26,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:26,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:26,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:26,599 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-09-15 01:09:27,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:27,414 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-09-15 01:09:27,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:09:27,416 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:27,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:27,417 INFO L225 Difference]: With dead ends: 235 [2020-09-15 01:09:27,417 INFO L226 Difference]: Without dead ends: 233 [2020-09-15 01:09:27,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:09:27,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-15 01:09:27,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-09-15 01:09:27,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:09:27,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-09-15 01:09:27,422 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-09-15 01:09:27,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:27,422 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-09-15 01:09:27,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:27,423 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-09-15 01:09:27,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:27,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:27,423 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:27,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:27,633 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:27,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:27,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1235135880, now seen corresponding path program 155 times [2020-09-15 01:09:27,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:27,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621491423] [2020-09-15 01:09:27,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:27,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621491423] [2020-09-15 01:09:27,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396646756] [2020-09-15 01:09:27,815 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 [2020-09-15 01:09:27,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:09:27,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:27,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:27,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:28,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:28,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:28,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090031056] [2020-09-15 01:09:28,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:28,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:28,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:28,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:28,184 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-09-15 01:09:29,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:29,135 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-09-15 01:09:29,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:09:29,137 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:29,138 INFO L225 Difference]: With dead ends: 252 [2020-09-15 01:09:29,138 INFO L226 Difference]: Without dead ends: 250 [2020-09-15 01:09:29,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:09:29,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-15 01:09:29,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-09-15 01:09:29,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:09:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-15 01:09:29,141 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-15 01:09:29,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:29,142 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-15 01:09:29,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-15 01:09:29,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:29,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:29,142 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:29,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-15 01:09:29,343 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:29,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:29,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1235157239, now seen corresponding path program 156 times [2020-09-15 01:09:29,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:29,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99908813] [2020-09-15 01:09:29,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:29,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99908813] [2020-09-15 01:09:29,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525137259] [2020-09-15 01:09:29,518 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 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 [2020-09-15 01:09:29,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:09:29,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:29,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:29,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:29,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:09:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:29,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:29,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:29,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326554579] [2020-09-15 01:09:29,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:29,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:29,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:29,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:29,894 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-15 01:09:31,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:31,064 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-09-15 01:09:31,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:09:31,066 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:31,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:31,067 INFO L225 Difference]: With dead ends: 258 [2020-09-15 01:09:31,067 INFO L226 Difference]: Without dead ends: 253 [2020-09-15 01:09:31,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=390, Invalid=800, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:09:31,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-15 01:09:31,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-09-15 01:09:31,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:09:31,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-15 01:09:31,071 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-15 01:09:31,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:31,071 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-15 01:09:31,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:31,072 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-15 01:09:31,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:31,072 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:31,072 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:31,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-15 01:09:31,273 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:31,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:31,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1235158200, now seen corresponding path program 157 times [2020-09-15 01:09:31,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:31,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726604720] [2020-09-15 01:09:31,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:31,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726604720] [2020-09-15 01:09:31,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266451540] [2020-09-15 01:09:31,442 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 [2020-09-15 01:09:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:31,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:31,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:33,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:09:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:33,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:33,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:33,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609378498] [2020-09-15 01:09:33,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:33,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:33,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:33,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-09-15 01:09:33,869 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-15 01:09:45,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:45,569 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-09-15 01:09:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:09:45,571 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:45,572 INFO L225 Difference]: With dead ends: 287 [2020-09-15 01:09:45,572 INFO L226 Difference]: Without dead ends: 279 [2020-09-15 01:09:45,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=381, Invalid=873, Unknown=6, NotChecked=0, Total=1260 [2020-09-15 01:09:45,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-09-15 01:09:45,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-09-15 01:09:45,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:09:45,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-09-15 01:09:45,576 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-09-15 01:09:45,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:45,576 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-09-15 01:09:45,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:45,576 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-09-15 01:09:45,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:45,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:45,577 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:45,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-09-15 01:09:45,786 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:45,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:45,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1235187030, now seen corresponding path program 158 times [2020-09-15 01:09:45,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:45,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629892817] [2020-09-15 01:09:45,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:45,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629892817] [2020-09-15 01:09:45,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63280353] [2020-09-15 01:09:45,947 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 [2020-09-15 01:09:45,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:09:45,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:45,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:45,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:46,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:09:46,252 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:09:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:46,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:46,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:46,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209482125] [2020-09-15 01:09:46,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:46,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:46,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:46,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:46,299 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 17 states. [2020-09-15 01:09:47,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:47,458 INFO L93 Difference]: Finished difference Result 260 states and 621 transitions. [2020-09-15 01:09:47,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:09:47,460 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:47,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:47,461 INFO L225 Difference]: With dead ends: 260 [2020-09-15 01:09:47,461 INFO L226 Difference]: Without dead ends: 255 [2020-09-15 01:09:47,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:09:47,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-15 01:09:47,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2020-09-15 01:09:47,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-15 01:09:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-09-15 01:09:47,465 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-09-15 01:09:47,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:47,466 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-09-15 01:09:47,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:47,466 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-09-15 01:09:47,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:47,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:47,466 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:47,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:47,669 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:47,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:47,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1241622630, now seen corresponding path program 159 times [2020-09-15 01:09:47,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:47,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494195566] [2020-09-15 01:09:47,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:47,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494195566] [2020-09-15 01:09:47,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830544294] [2020-09-15 01:09:47,859 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 [2020-09-15 01:09:47,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:09:47,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:47,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:47,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:50,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:50,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:50,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982051369] [2020-09-15 01:09:50,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:50,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:50,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:50,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:50,213 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-09-15 01:09:50,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:50,937 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-09-15 01:09:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:09:50,938 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:50,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:50,939 INFO L225 Difference]: With dead ends: 235 [2020-09-15 01:09:50,939 INFO L226 Difference]: Without dead ends: 233 [2020-09-15 01:09:50,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:09:50,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-15 01:09:50,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-09-15 01:09:50,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:09:50,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-09-15 01:09:50,942 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-09-15 01:09:50,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:50,943 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-09-15 01:09:50,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:50,943 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-09-15 01:09:50,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:50,943 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:50,943 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:51,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:51,144 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:51,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:51,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1241623591, now seen corresponding path program 160 times [2020-09-15 01:09:51,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:51,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282105014] [2020-09-15 01:09:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:51,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282105014] [2020-09-15 01:09:51,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225097735] [2020-09-15 01:09:51,323 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 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 [2020-09-15 01:09:51,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:09:51,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:51,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:51,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:55,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:55,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:55,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082015329] [2020-09-15 01:09:55,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:55,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:55,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:55,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=213, Unknown=1, NotChecked=0, Total=272 [2020-09-15 01:09:55,854 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-09-15 01:10:00,295 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-15 01:10:06,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:06,810 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2020-09-15 01:10:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:10:06,812 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:10:06,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:06,812 INFO L225 Difference]: With dead ends: 241 [2020-09-15 01:10:06,813 INFO L226 Difference]: Without dead ends: 239 [2020-09-15 01:10:06,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=203, Invalid=552, Unknown=1, NotChecked=0, Total=756 [2020-09-15 01:10:06,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-15 01:10:06,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-09-15 01:10:06,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:10:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-09-15 01:10:06,816 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-09-15 01:10:06,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:06,816 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-09-15 01:10:06,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:10:06,816 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-09-15 01:10:06,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:06,817 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:06,817 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:07,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-15 01:10:07,018 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:07,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:07,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1241652421, now seen corresponding path program 161 times [2020-09-15 01:10:07,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:07,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612081662] [2020-09-15 01:10:07,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:07,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612081662] [2020-09-15 01:10:07,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083872647] [2020-09-15 01:10:07,187 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 [2020-09-15 01:10:07,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:10:07,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:07,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:07,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:07,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:07,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:10:07,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281135636] [2020-09-15 01:10:07,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:10:07,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:07,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:10:07,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:10:07,586 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-09-15 01:10:08,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:08,358 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-09-15 01:10:08,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:10:08,360 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:10:08,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:08,361 INFO L225 Difference]: With dead ends: 235 [2020-09-15 01:10:08,361 INFO L226 Difference]: Without dead ends: 233 [2020-09-15 01:10:08,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:10:08,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-15 01:10:08,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-09-15 01:10:08,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:10:08,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-09-15 01:10:08,364 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-09-15 01:10:08,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:08,365 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-09-15 01:10:08,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:10:08,365 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-09-15 01:10:08,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:08,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:08,365 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:08,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:08,566 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:08,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:08,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1262178420, now seen corresponding path program 162 times [2020-09-15 01:10:08,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:08,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862302482] [2020-09-15 01:10:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:08,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862302482] [2020-09-15 01:10:08,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828255354] [2020-09-15 01:10:08,733 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 [2020-09-15 01:10:08,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:10:08,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:08,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:08,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:10,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:10,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:10:10,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652002665] [2020-09-15 01:10:10,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:10:10,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:10,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:10:10,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:10:10,477 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-09-15 01:10:11,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:11,620 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-09-15 01:10:11,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:10:11,621 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:10:11,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:11,622 INFO L225 Difference]: With dead ends: 254 [2020-09-15 01:10:11,622 INFO L226 Difference]: Without dead ends: 252 [2020-09-15 01:10:11,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:10:11,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-15 01:10:11,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-09-15 01:10:11,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:10:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-09-15 01:10:11,626 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-09-15 01:10:11,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:11,626 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-09-15 01:10:11,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:10:11,626 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-09-15 01:10:11,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:11,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:11,627 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:11,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:11,828 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:11,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:11,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1262179381, now seen corresponding path program 163 times [2020-09-15 01:10:11,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:11,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751108636] [2020-09-15 01:10:11,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:12,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751108636] [2020-09-15 01:10:12,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7715765] [2020-09-15 01:10:12,011 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 [2020-09-15 01:10:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:12,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:12,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:14,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:14,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:10:14,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108024309] [2020-09-15 01:10:14,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:10:14,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:14,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:10:14,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:10:14,048 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-09-15 01:10:18,609 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-15 01:10:33,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:33,529 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-09-15 01:10:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:10:33,531 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:10:33,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:33,531 INFO L225 Difference]: With dead ends: 264 [2020-09-15 01:10:33,531 INFO L226 Difference]: Without dead ends: 262 [2020-09-15 01:10:33,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=302, Invalid=750, Unknown=4, NotChecked=0, Total=1056 [2020-09-15 01:10:33,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-15 01:10:33,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-09-15 01:10:33,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-15 01:10:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-09-15 01:10:33,535 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-09-15 01:10:33,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:33,535 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-09-15 01:10:33,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:10:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-09-15 01:10:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:33,536 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:33,536 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:33,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:33,737 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:33,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:33,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1262841510, now seen corresponding path program 164 times [2020-09-15 01:10:33,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:33,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15663772] [2020-09-15 01:10:33,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:33,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15663772] [2020-09-15 01:10:33,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735223907] [2020-09-15 01:10:33,916 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 [2020-09-15 01:10:33,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:10:33,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:33,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:33,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:34,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:34,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:10:34,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983048249] [2020-09-15 01:10:34,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:10:34,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:34,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:10:34,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:10:34,326 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-09-15 01:10:35,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:35,486 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-09-15 01:10:35,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:10:35,488 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:10:35,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:35,488 INFO L225 Difference]: With dead ends: 255 [2020-09-15 01:10:35,488 INFO L226 Difference]: Without dead ends: 253 [2020-09-15 01:10:35,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:10:35,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-15 01:10:35,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-09-15 01:10:35,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:10:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-15 01:10:35,492 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-15 01:10:35,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:35,492 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-15 01:10:35,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:10:35,492 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-15 01:10:35,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:35,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:35,493 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:35,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:35,694 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:35,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:35,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1262862869, now seen corresponding path program 165 times [2020-09-15 01:10:35,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:35,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081335123] [2020-09-15 01:10:35,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:35,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081335123] [2020-09-15 01:10:35,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125368216] [2020-09-15 01:10:35,887 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 [2020-09-15 01:10:35,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:10:35,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:35,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:35,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:36,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:10:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:36,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:36,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:10:36,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628752540] [2020-09-15 01:10:36,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:10:36,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:36,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:10:36,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:10:36,336 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-15 01:10:37,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:37,799 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-09-15 01:10:37,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:10:37,801 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:10:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:37,802 INFO L225 Difference]: With dead ends: 256 [2020-09-15 01:10:37,802 INFO L226 Difference]: Without dead ends: 251 [2020-09-15 01:10:37,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=429, Invalid=903, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:10:37,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-15 01:10:37,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-09-15 01:10:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:10:37,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-15 01:10:37,805 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-15 01:10:37,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:37,806 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-15 01:10:37,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:10:37,806 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-15 01:10:37,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:37,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:37,806 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:38,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:38,007 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:38,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:38,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1262863830, now seen corresponding path program 166 times [2020-09-15 01:10:38,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:38,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257599897] [2020-09-15 01:10:38,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:38,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257599897] [2020-09-15 01:10:38,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191157260] [2020-09-15 01:10:38,187 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 [2020-09-15 01:10:38,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:10:38,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:38,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:38,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:38,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:38,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:38,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:38,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:38,555 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:38,558 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:38,560 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:38,562 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:38,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:38,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:10:38,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234141012] [2020-09-15 01:10:38,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:10:38,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:38,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:10:38,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:10:38,655 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-15 01:10:40,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:40,280 INFO L93 Difference]: Finished difference Result 279 states and 667 transitions. [2020-09-15 01:10:40,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:10:40,281 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:10:40,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:40,282 INFO L225 Difference]: With dead ends: 279 [2020-09-15 01:10:40,282 INFO L226 Difference]: Without dead ends: 274 [2020-09-15 01:10:40,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=429, Invalid=977, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:10:40,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-09-15 01:10:40,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 165. [2020-09-15 01:10:40,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-15 01:10:40,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-09-15 01:10:40,287 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-09-15 01:10:40,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:40,288 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-09-15 01:10:40,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:10:40,288 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-09-15 01:10:40,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:40,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:40,289 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:40,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-15 01:10:40,498 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:40,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:40,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1262871301, now seen corresponding path program 167 times [2020-09-15 01:10:40,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:40,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946944492] [2020-09-15 01:10:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:40,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946944492] [2020-09-15 01:10:40,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747448936] [2020-09-15 01:10:40,714 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 [2020-09-15 01:10:40,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:10:40,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:40,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:40,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:44,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:44,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:10:44,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136019018] [2020-09-15 01:10:44,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:10:44,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:44,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:10:44,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=198, Unknown=1, NotChecked=0, Total=272 [2020-09-15 01:10:44,891 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-09-15 01:10:49,470 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-15 01:10:53,773 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-15 01:10:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:54,581 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-09-15 01:10:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:10:54,583 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:10:54,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:54,584 INFO L225 Difference]: With dead ends: 271 [2020-09-15 01:10:54,584 INFO L226 Difference]: Without dead ends: 269 [2020-09-15 01:10:54,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=362, Invalid=897, Unknown=1, NotChecked=0, Total=1260 [2020-09-15 01:10:54,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-15 01:10:54,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-09-15 01:10:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:10:54,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-15 01:10:54,588 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-15 01:10:54,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:54,588 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-15 01:10:54,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:10:54,588 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-15 01:10:54,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:54,588 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:54,588 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:54,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-15 01:10:54,789 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:54,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:54,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1262892660, now seen corresponding path program 168 times [2020-09-15 01:10:54,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:54,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640941214] [2020-09-15 01:10:54,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:54,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640941214] [2020-09-15 01:10:54,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622674116] [2020-09-15 01:10:54,983 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 [2020-09-15 01:10:55,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:10:55,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:55,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:55,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:58,318 WARN L860 $PredicateComparison]: unable to prove that (exists ((aux_div_70 Int) (v_~i~0_506 Int) (aux_div_38 Int)) (let ((.cse0 (* 2 aux_div_70)) (.cse1 (* 2 aux_div_38))) (and (<= c_~i~0 (+ v_~i~0_506 c_~j~0)) (<= v_~i~0_506 (+ .cse0 .cse1 3)) (<= (+ .cse0 c_~j~0) (* 2 v_~i~0_506)) (<= aux_div_70 1) (<= c_~j~0 (+ v_~i~0_506 .cse1 2)) (<= (+ .cse0 .cse1 1) v_~i~0_506) (<= aux_div_38 1)))) is different from true [2020-09-15 01:10:58,322 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:10:58,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:58,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:58,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:10:58,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946878771] [2020-09-15 01:10:58,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:10:58,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:58,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:10:58,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=164, Unknown=2, NotChecked=28, Total=272 [2020-09-15 01:10:58,418 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-15 01:10:58,965 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-09-15 01:11:03,135 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-15 01:11:07,387 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-09-15 01:11:11,547 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-15 01:11:17,972 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-09-15 01:11:24,926 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-09-15 01:11:40,674 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-09-15 01:11:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:41,139 INFO L93 Difference]: Finished difference Result 292 states and 717 transitions. [2020-09-15 01:11:41,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:11:41,141 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:41,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:41,142 INFO L225 Difference]: With dead ends: 292 [2020-09-15 01:11:41,142 INFO L226 Difference]: Without dead ends: 287 [2020-09-15 01:11:41,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=501, Invalid=1127, Unknown=16, NotChecked=78, Total=1722 [2020-09-15 01:11:41,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-09-15 01:11:41,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 168. [2020-09-15 01:11:41,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-15 01:11:41,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-09-15 01:11:41,147 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-09-15 01:11:41,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:41,147 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-09-15 01:11:41,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:41,147 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-09-15 01:11:41,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:41,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:41,148 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:41,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-15 01:11:41,358 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:41,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:41,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1262893621, now seen corresponding path program 169 times [2020-09-15 01:11:41,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:41,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241372526] [2020-09-15 01:11:41,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:41,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241372526] [2020-09-15 01:11:41,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034573240] [2020-09-15 01:11:41,566 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 [2020-09-15 01:11:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:41,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:41,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:43,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:11:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:44,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:44,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:44,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976895892] [2020-09-15 01:11:44,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:44,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:44,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:44,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=192, Unknown=1, NotChecked=0, Total=272 [2020-09-15 01:11:44,017 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-09-15 01:11:44,967 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-09-15 01:11:46,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:46,504 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-09-15 01:11:46,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:11:46,506 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:46,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:46,506 INFO L225 Difference]: With dead ends: 292 [2020-09-15 01:11:46,507 INFO L226 Difference]: Without dead ends: 284 [2020-09-15 01:11:46,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=441, Invalid=1040, Unknown=1, NotChecked=0, Total=1482 [2020-09-15 01:11:46,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-15 01:11:46,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-09-15 01:11:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:11:46,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-09-15 01:11:46,511 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-09-15 01:11:46,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:46,511 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-09-15 01:11:46,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:46,511 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-09-15 01:11:46,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:46,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:46,512 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:46,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-09-15 01:11:46,713 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:46,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:46,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1263101941, now seen corresponding path program 170 times [2020-09-15 01:11:46,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:46,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878032488] [2020-09-15 01:11:46,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:46,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878032488] [2020-09-15 01:11:46,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463127657] [2020-09-15 01:11:46,896 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 [2020-09-15 01:11:46,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:11:46,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:46,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:46,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:47,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:47,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:47,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188243766] [2020-09-15 01:11:47,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:47,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:47,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:47,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:47,362 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-09-15 01:11:48,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:48,213 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-09-15 01:11:48,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:11:48,215 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:48,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:48,215 INFO L225 Difference]: With dead ends: 231 [2020-09-15 01:11:48,216 INFO L226 Difference]: Without dead ends: 229 [2020-09-15 01:11:48,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:11:48,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-09-15 01:11:48,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-09-15 01:11:48,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:11:48,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-09-15 01:11:48,219 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-09-15 01:11:48,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:48,219 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-09-15 01:11:48,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:48,219 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-09-15 01:11:48,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:48,220 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:48,220 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:48,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-15 01:11:48,421 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:48,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:48,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1263765031, now seen corresponding path program 171 times [2020-09-15 01:11:48,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:48,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561746251] [2020-09-15 01:11:48,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:48,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561746251] [2020-09-15 01:11:48,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650620734] [2020-09-15 01:11:48,627 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 [2020-09-15 01:11:48,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:11:48,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:48,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:48,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:49,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:49,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:49,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222719385] [2020-09-15 01:11:49,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:49,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:49,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:49,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:49,078 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-09-15 01:11:50,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:50,425 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-09-15 01:11:50,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:11:50,427 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:50,428 INFO L225 Difference]: With dead ends: 250 [2020-09-15 01:11:50,428 INFO L226 Difference]: Without dead ends: 248 [2020-09-15 01:11:50,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:11:50,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-15 01:11:50,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-09-15 01:11:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:11:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-09-15 01:11:50,431 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-09-15 01:11:50,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:50,431 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-09-15 01:11:50,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:50,432 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-09-15 01:11:50,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:50,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:50,432 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:50,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:50,633 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:50,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:50,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1263787351, now seen corresponding path program 172 times [2020-09-15 01:11:50,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:50,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244904717] [2020-09-15 01:11:50,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:50,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244904717] [2020-09-15 01:11:50,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777143720] [2020-09-15 01:11:50,845 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 [2020-09-15 01:11:50,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:11:50,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:50,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:50,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:51,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:11:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:51,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:51,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:51,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129676936] [2020-09-15 01:11:51,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:51,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:51,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:51,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:51,287 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-09-15 01:11:53,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:53,303 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-09-15 01:11:53,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:11:53,305 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:53,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:53,306 INFO L225 Difference]: With dead ends: 288 [2020-09-15 01:11:53,306 INFO L226 Difference]: Without dead ends: 283 [2020-09-15 01:11:53,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=441, Invalid=1041, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:11:53,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-15 01:11:53,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-09-15 01:11:53,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-15 01:11:53,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-09-15 01:11:53,310 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-09-15 01:11:53,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:53,310 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-09-15 01:11:53,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:53,310 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-09-15 01:11:53,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:53,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:53,311 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:53,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-09-15 01:11:53,512 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:53,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1463267670, now seen corresponding path program 173 times [2020-09-15 01:11:53,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:53,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415877430] [2020-09-15 01:11:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:53,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415877430] [2020-09-15 01:11:53,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734882124] [2020-09-15 01:11:53,707 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 [2020-09-15 01:11:53,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:11:53,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:53,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:53,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:54,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:54,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:54,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136682955] [2020-09-15 01:11:54,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:54,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:54,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:54,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:54,085 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-09-15 01:11:54,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:54,889 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-09-15 01:11:54,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:11:54,891 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:54,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:54,891 INFO L225 Difference]: With dead ends: 236 [2020-09-15 01:11:54,891 INFO L226 Difference]: Without dead ends: 234 [2020-09-15 01:11:54,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:11:54,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-09-15 01:11:54,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-09-15 01:11:54,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:11:54,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-15 01:11:54,895 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-15 01:11:54,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:54,895 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-15 01:11:54,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-15 01:11:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:54,895 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:54,896 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:55,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-09-15 01:11:55,096 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:55,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:55,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1463268631, now seen corresponding path program 174 times [2020-09-15 01:11:55,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:55,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478981249] [2020-09-15 01:11:55,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:55,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478981249] [2020-09-15 01:11:55,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453777894] [2020-09-15 01:11:55,316 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 [2020-09-15 01:11:55,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:11:55,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:55,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:55,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:55,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:55,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:55,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854371294] [2020-09-15 01:11:55,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:55,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:55,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:55,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:55,764 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-15 01:11:56,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:56,742 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-09-15 01:11:56,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:11:56,744 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:56,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:56,744 INFO L225 Difference]: With dead ends: 246 [2020-09-15 01:11:56,744 INFO L226 Difference]: Without dead ends: 244 [2020-09-15 01:11:56,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:11:56,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-15 01:11:56,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-09-15 01:11:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:11:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-15 01:11:56,748 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-15 01:11:56,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:56,748 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-15 01:11:56,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-15 01:11:56,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:56,749 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:56,749 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:56,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:56,950 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:56,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:56,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1463297461, now seen corresponding path program 175 times [2020-09-15 01:11:56,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:56,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530894849] [2020-09-15 01:11:56,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:57,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530894849] [2020-09-15 01:11:57,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546305652] [2020-09-15 01:11:57,168 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 [2020-09-15 01:11:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:57,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:57,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:57,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:57,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:57,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156701333] [2020-09-15 01:11:57,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:57,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:57,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:57,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:57,557 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-15 01:11:58,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:58,305 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-09-15 01:11:58,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:11:58,307 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:58,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:58,308 INFO L225 Difference]: With dead ends: 239 [2020-09-15 01:11:58,308 INFO L226 Difference]: Without dead ends: 237 [2020-09-15 01:11:58,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:11:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-15 01:11:58,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-09-15 01:11:58,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:11:58,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-15 01:11:58,316 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-15 01:11:58,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:58,316 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-15 01:11:58,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:58,316 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-15 01:11:58,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:58,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:58,317 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:58,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:58,518 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:58,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:58,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1464221943, now seen corresponding path program 176 times [2020-09-15 01:11:58,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:58,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239200114] [2020-09-15 01:11:58,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:58,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239200114] [2020-09-15 01:11:58,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954551821] [2020-09-15 01:11:58,714 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 [2020-09-15 01:11:58,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:11:58,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:58,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:58,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:59,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:59,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:59,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274672333] [2020-09-15 01:11:59,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:59,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:59,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:59,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:59,135 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-15 01:11:59,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:59,798 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-09-15 01:11:59,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:11:59,800 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:59,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:59,801 INFO L225 Difference]: With dead ends: 229 [2020-09-15 01:11:59,801 INFO L226 Difference]: Without dead ends: 227 [2020-09-15 01:11:59,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:11:59,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-15 01:11:59,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-09-15 01:11:59,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-15 01:11:59,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-09-15 01:11:59,804 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-09-15 01:11:59,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:59,804 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-09-15 01:11:59,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:59,804 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-09-15 01:11:59,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:59,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:59,805 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:00,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:00,006 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:00,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:00,006 INFO L82 PathProgramCache]: Analyzing trace with hash 2100497160, now seen corresponding path program 177 times [2020-09-15 01:12:00,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:00,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624509248] [2020-09-15 01:12:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:00,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624509248] [2020-09-15 01:12:00,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142274347] [2020-09-15 01:12:00,199 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 [2020-09-15 01:12:00,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:12:00,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:00,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:00,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:00,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:00,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:12:00,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815564929] [2020-09-15 01:12:00,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:12:00,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:00,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:12:00,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:00,537 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-09-15 01:12:01,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:01,844 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-09-15 01:12:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:12:01,846 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:12:01,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:01,847 INFO L225 Difference]: With dead ends: 261 [2020-09-15 01:12:01,847 INFO L226 Difference]: Without dead ends: 259 [2020-09-15 01:12:01,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=364, Invalid=968, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:12:01,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-15 01:12:01,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-09-15 01:12:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:12:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-09-15 01:12:01,851 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-09-15 01:12:01,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:01,851 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-09-15 01:12:01,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:12:01,851 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-09-15 01:12:01,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:01,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:01,852 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:02,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:02,052 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:02,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:02,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2100498121, now seen corresponding path program 178 times [2020-09-15 01:12:02,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:02,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304156753] [2020-09-15 01:12:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:02,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304156753] [2020-09-15 01:12:02,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478027356] [2020-09-15 01:12:02,241 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 [2020-09-15 01:12:02,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:12:02,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:02,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:02,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:02,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:02,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:12:02,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207038902] [2020-09-15 01:12:02,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:12:02,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:02,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:12:02,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:02,615 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-09-15 01:12:03,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:03,830 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-09-15 01:12:03,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:12:03,831 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:12:03,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:03,832 INFO L225 Difference]: With dead ends: 271 [2020-09-15 01:12:03,832 INFO L226 Difference]: Without dead ends: 269 [2020-09-15 01:12:03,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=307, Invalid=815, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:12:03,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-15 01:12:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-09-15 01:12:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:12:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-09-15 01:12:03,841 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-09-15 01:12:03,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:03,841 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-09-15 01:12:03,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:12:03,841 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-09-15 01:12:03,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:03,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:03,842 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:04,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-09-15 01:12:04,044 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:04,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:04,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2100526951, now seen corresponding path program 179 times [2020-09-15 01:12:04,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:04,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530862430] [2020-09-15 01:12:04,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:04,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530862430] [2020-09-15 01:12:04,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313682257] [2020-09-15 01:12:04,227 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 [2020-09-15 01:12:04,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:12:04,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:04,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:04,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:04,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:04,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:12:04,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806570863] [2020-09-15 01:12:04,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:12:04,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:04,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:12:04,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:04,575 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-09-15 01:12:05,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:05,606 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-09-15 01:12:05,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:12:05,608 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:12:05,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:05,609 INFO L225 Difference]: With dead ends: 253 [2020-09-15 01:12:05,609 INFO L226 Difference]: Without dead ends: 251 [2020-09-15 01:12:05,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:12:05,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-15 01:12:05,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-09-15 01:12:05,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-15 01:12:05,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-09-15 01:12:05,613 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-09-15 01:12:05,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:05,614 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-09-15 01:12:05,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:12:05,614 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-09-15 01:12:05,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:05,614 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:05,614 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:05,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-09-15 01:12:05,815 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:05,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:05,816 INFO L82 PathProgramCache]: Analyzing trace with hash 2121052950, now seen corresponding path program 180 times [2020-09-15 01:12:05,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:05,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210446684] [2020-09-15 01:12:05,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:06,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210446684] [2020-09-15 01:12:06,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723052376] [2020-09-15 01:12:06,017 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 [2020-09-15 01:12:06,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:12:06,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:06,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:06,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:06,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:06,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:12:06,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117272259] [2020-09-15 01:12:06,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:12:06,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:06,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:12:06,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:06,372 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-09-15 01:12:07,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:07,696 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-09-15 01:12:07,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:12:07,697 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:12:07,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:07,698 INFO L225 Difference]: With dead ends: 268 [2020-09-15 01:12:07,698 INFO L226 Difference]: Without dead ends: 266 [2020-09-15 01:12:07,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=410, Invalid=996, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:12:07,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-15 01:12:07,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-09-15 01:12:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:12:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-15 01:12:07,702 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-15 01:12:07,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:07,702 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-15 01:12:07,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:12:07,702 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-15 01:12:07,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:07,703 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:07,703 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:07,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-15 01:12:07,904 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:07,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:07,904 INFO L82 PathProgramCache]: Analyzing trace with hash 2121053911, now seen corresponding path program 181 times [2020-09-15 01:12:07,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:07,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543080278] [2020-09-15 01:12:07,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:08,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543080278] [2020-09-15 01:12:08,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446887937] [2020-09-15 01:12:08,084 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 [2020-09-15 01:12:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:08,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:08,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:08,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:08,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:12:08,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816096171] [2020-09-15 01:12:08,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:12:08,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:08,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:12:08,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:08,439 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-15 01:12:09,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:09,835 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-09-15 01:12:09,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:12:09,837 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:12:09,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:09,838 INFO L225 Difference]: With dead ends: 271 [2020-09-15 01:12:09,838 INFO L226 Difference]: Without dead ends: 269 [2020-09-15 01:12:09,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:12:09,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-15 01:12:09,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-09-15 01:12:09,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:12:09,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-09-15 01:12:09,842 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-09-15 01:12:09,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:09,842 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-09-15 01:12:09,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:12:09,842 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-09-15 01:12:09,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:09,843 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:09,843 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:10,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2020-09-15 01:12:10,044 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:10,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:10,044 INFO L82 PathProgramCache]: Analyzing trace with hash 2121716040, now seen corresponding path program 182 times [2020-09-15 01:12:10,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:10,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019449317] [2020-09-15 01:12:10,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:10,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019449317] [2020-09-15 01:12:10,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986682468] [2020-09-15 01:12:10,240 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 [2020-09-15 01:12:10,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:12:10,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:10,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:10,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:10,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:10,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:12:10,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377649621] [2020-09-15 01:12:10,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:12:10,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:10,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:12:10,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:10,600 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-09-15 01:12:11,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:11,997 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2020-09-15 01:12:11,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:12:11,998 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:12:11,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:11,999 INFO L225 Difference]: With dead ends: 262 [2020-09-15 01:12:11,999 INFO L226 Difference]: Without dead ends: 260 [2020-09-15 01:12:11,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=428, Invalid=978, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:12:12,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-15 01:12:12,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 171. [2020-09-15 01:12:12,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-15 01:12:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-15 01:12:12,003 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-15 01:12:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:12,003 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-15 01:12:12,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:12:12,003 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-15 01:12:12,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:12,004 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:12,004 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:12,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-15 01:12:12,205 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:12,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:12,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2121737399, now seen corresponding path program 183 times [2020-09-15 01:12:12,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:12,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387097799] [2020-09-15 01:12:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:12,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387097799] [2020-09-15 01:12:12,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003527909] [2020-09-15 01:12:12,406 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 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 [2020-09-15 01:12:12,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:12:12,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:12,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:12,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:12,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:12:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:12,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:12,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:12:12,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361117755] [2020-09-15 01:12:12,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:12:12,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:12,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:12:12,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:12,736 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-15 01:12:14,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:14,051 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-09-15 01:12:14,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:12:14,053 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:12:14,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:14,054 INFO L225 Difference]: With dead ends: 248 [2020-09-15 01:12:14,060 INFO L226 Difference]: Without dead ends: 243 [2020-09-15 01:12:14,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=474, Invalid=1008, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:12:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-15 01:12:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-09-15 01:12:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-15 01:12:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-15 01:12:14,063 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-15 01:12:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:14,064 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-15 01:12:14,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:12:14,064 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-15 01:12:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:14,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:14,064 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:14,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:14,265 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:14,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:14,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2121738360, now seen corresponding path program 184 times [2020-09-15 01:12:14,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:14,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481137292] [2020-09-15 01:12:14,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:14,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481137292] [2020-09-15 01:12:14,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837388655] [2020-09-15 01:12:14,479 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 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 [2020-09-15 01:12:14,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:12:14,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:14,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:14,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:14,809 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:14,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:14,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:12:14,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744144606] [2020-09-15 01:12:14,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:12:14,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:14,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:12:14,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:14,883 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-15 01:12:16,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:16,634 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-09-15 01:12:16,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:12:16,635 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:12:16,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:16,636 INFO L225 Difference]: With dead ends: 287 [2020-09-15 01:12:16,636 INFO L226 Difference]: Without dead ends: 282 [2020-09-15 01:12:16,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=506, Invalid=1216, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:12:16,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-15 01:12:16,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-09-15 01:12:16,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:12:16,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-09-15 01:12:16,641 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-09-15 01:12:16,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:16,641 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-09-15 01:12:16,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:12:16,641 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-09-15 01:12:16,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:16,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:16,641 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:16,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-09-15 01:12:16,842 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:16,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:16,843 INFO L82 PathProgramCache]: Analyzing trace with hash 2121745831, now seen corresponding path program 185 times [2020-09-15 01:12:16,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:16,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898336341] [2020-09-15 01:12:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:17,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898336341] [2020-09-15 01:12:17,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910868539] [2020-09-15 01:12:17,043 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 [2020-09-15 01:12:17,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:12:17,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:17,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:17,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:17,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:17,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:12:17,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156509241] [2020-09-15 01:12:17,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:12:17,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:17,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:12:17,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:17,413 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-09-15 01:12:19,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:19,102 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-09-15 01:12:19,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:12:19,104 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:12:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:19,104 INFO L225 Difference]: With dead ends: 284 [2020-09-15 01:12:19,105 INFO L226 Difference]: Without dead ends: 282 [2020-09-15 01:12:19,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=439, Invalid=1121, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:12:19,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-15 01:12:19,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-09-15 01:12:19,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-15 01:12:19,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-15 01:12:19,109 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-15 01:12:19,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:19,109 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-15 01:12:19,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:12:19,109 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-15 01:12:19,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:19,110 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:19,110 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:19,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:19,311 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:19,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:19,311 INFO L82 PathProgramCache]: Analyzing trace with hash 2121767190, now seen corresponding path program 186 times [2020-09-15 01:12:19,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:19,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354520271] [2020-09-15 01:12:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:19,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354520271] [2020-09-15 01:12:19,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529429361] [2020-09-15 01:12:19,534 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 [2020-09-15 01:12:19,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:12:19,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:19,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:19,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:19,878 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:12:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:19,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:19,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:12:19,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719045759] [2020-09-15 01:12:19,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:12:19,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:19,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:12:19,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:19,959 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-15 01:12:21,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:21,794 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-09-15 01:12:21,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:12:21,796 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:12:21,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:21,796 INFO L225 Difference]: With dead ends: 289 [2020-09-15 01:12:21,797 INFO L226 Difference]: Without dead ends: 284 [2020-09-15 01:12:21,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=501, Invalid=1139, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:12:21,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-15 01:12:21,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-09-15 01:12:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-15 01:12:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-09-15 01:12:21,801 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-09-15 01:12:21,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:21,801 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-09-15 01:12:21,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:12:21,801 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-09-15 01:12:21,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:21,801 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:21,801 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:22,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:22,002 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:22,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:22,003 INFO L82 PathProgramCache]: Analyzing trace with hash 2121768151, now seen corresponding path program 187 times [2020-09-15 01:12:22,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:22,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398954484] [2020-09-15 01:12:22,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:22,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398954484] [2020-09-15 01:12:22,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503706186] [2020-09-15 01:12:22,207 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:22,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:22,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:22,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:22,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:22,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:22,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:12:22,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509239356] [2020-09-15 01:12:22,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:12:22,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:22,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:12:22,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:22,556 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-09-15 01:12:24,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:24,793 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-09-15 01:12:24,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:12:24,795 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:12:24,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:24,796 INFO L225 Difference]: With dead ends: 312 [2020-09-15 01:12:24,796 INFO L226 Difference]: Without dead ends: 304 [2020-09-15 01:12:24,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=559, Invalid=1421, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:12:24,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-15 01:12:24,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-09-15 01:12:24,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-15 01:12:24,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-09-15 01:12:24,800 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-09-15 01:12:24,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:24,800 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-09-15 01:12:24,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:12:24,800 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-09-15 01:12:24,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:24,800 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:24,801 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:25,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:25,001 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:25,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:25,002 INFO L82 PathProgramCache]: Analyzing trace with hash 2121976471, now seen corresponding path program 188 times [2020-09-15 01:12:25,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:25,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653644857] [2020-09-15 01:12:25,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:25,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653644857] [2020-09-15 01:12:25,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282521191] [2020-09-15 01:12:25,220 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:25,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:12:25,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:25,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:25,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:25,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:25,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:12:25,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237307555] [2020-09-15 01:12:25,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:12:25,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:25,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:12:25,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:25,605 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-09-15 01:12:26,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:26,805 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-09-15 01:12:26,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:12:26,806 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:12:26,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:26,807 INFO L225 Difference]: With dead ends: 262 [2020-09-15 01:12:26,807 INFO L226 Difference]: Without dead ends: 260 [2020-09-15 01:12:26,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=326, Invalid=864, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:12:26,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-15 01:12:26,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-09-15 01:12:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:12:26,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-15 01:12:26,811 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-15 01:12:26,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:26,811 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-15 01:12:26,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:12:26,811 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-15 01:12:26,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:26,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:26,812 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:27,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-09-15 01:12:27,013 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:27,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:27,013 INFO L82 PathProgramCache]: Analyzing trace with hash 2122639561, now seen corresponding path program 189 times [2020-09-15 01:12:27,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:27,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744383866] [2020-09-15 01:12:27,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:27,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744383866] [2020-09-15 01:12:27,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835243676] [2020-09-15 01:12:27,234 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:27,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:12:27,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:27,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:27,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:27,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:27,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:12:27,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420270341] [2020-09-15 01:12:27,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:12:27,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:27,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:12:27,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:27,596 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-15 01:12:29,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:29,039 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-09-15 01:12:29,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:12:29,041 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:12:29,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:29,041 INFO L225 Difference]: With dead ends: 271 [2020-09-15 01:12:29,041 INFO L226 Difference]: Without dead ends: 269 [2020-09-15 01:12:29,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:12:29,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-15 01:12:29,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-09-15 01:12:29,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:12:29,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-15 01:12:29,044 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-15 01:12:29,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:29,045 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-15 01:12:29,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:12:29,045 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-15 01:12:29,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:29,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:29,046 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:29,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-09-15 01:12:29,254 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:29,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:29,255 INFO L82 PathProgramCache]: Analyzing trace with hash 2122660920, now seen corresponding path program 190 times [2020-09-15 01:12:29,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:29,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115001267] [2020-09-15 01:12:29,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:29,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115001267] [2020-09-15 01:12:29,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25269351] [2020-09-15 01:12:29,487 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:29,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:12:29,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:29,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:29,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:29,821 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:12:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:29,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:29,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:12:29,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488986653] [2020-09-15 01:12:29,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:12:29,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:29,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:12:29,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:29,848 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-15 01:12:31,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:31,673 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-09-15 01:12:31,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:12:31,675 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:12:31,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:31,676 INFO L225 Difference]: With dead ends: 296 [2020-09-15 01:12:31,676 INFO L226 Difference]: Without dead ends: 288 [2020-09-15 01:12:31,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=581, Invalid=1399, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:12:31,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-09-15 01:12:31,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-09-15 01:12:31,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-15 01:12:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-09-15 01:12:31,680 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-09-15 01:12:31,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:31,680 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-09-15 01:12:31,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:12:31,680 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-09-15 01:12:31,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:31,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:31,680 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:31,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-09-15 01:12:31,881 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:31,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:31,882 INFO L82 PathProgramCache]: Analyzing trace with hash 2122661881, now seen corresponding path program 191 times [2020-09-15 01:12:31,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:31,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79665541] [2020-09-15 01:12:31,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:32,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79665541] [2020-09-15 01:12:32,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992451860] [2020-09-15 01:12:32,116 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:32,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:12:32,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:32,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:32,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:32,446 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:32,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:32,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:12:32,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454164618] [2020-09-15 01:12:32,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:12:32,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:32,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:12:32,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:32,469 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-09-15 01:12:34,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:34,243 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-09-15 01:12:34,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:12:34,246 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:12:34,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:34,246 INFO L225 Difference]: With dead ends: 298 [2020-09-15 01:12:34,247 INFO L226 Difference]: Without dead ends: 290 [2020-09-15 01:12:34,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=500, Invalid=1222, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:12:34,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-15 01:12:34,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-09-15 01:12:34,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:12:34,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-09-15 01:12:34,251 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-09-15 01:12:34,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:34,251 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-09-15 01:12:34,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:12:34,251 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-09-15 01:12:34,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:34,252 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:34,252 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:34,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-09-15 01:12:34,453 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:34,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:34,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2122690711, now seen corresponding path program 192 times [2020-09-15 01:12:34,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:34,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700468271] [2020-09-15 01:12:34,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:34,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700468271] [2020-09-15 01:12:34,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49528418] [2020-09-15 01:12:34,673 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:34,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:12:34,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:34,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:34,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:34,999 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:12:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:35,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:35,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:12:35,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947034399] [2020-09-15 01:12:35,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:12:35,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:35,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:12:35,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:35,025 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-09-15 01:12:36,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:36,930 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-09-15 01:12:36,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:12:36,932 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:12:36,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:36,933 INFO L225 Difference]: With dead ends: 291 [2020-09-15 01:12:36,933 INFO L226 Difference]: Without dead ends: 283 [2020-09-15 01:12:36,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=498, Invalid=1224, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:12:36,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-15 01:12:36,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-09-15 01:12:36,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:12:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-15 01:12:36,937 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-15 01:12:36,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:36,937 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-15 01:12:36,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:12:36,937 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-15 01:12:36,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:36,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:36,938 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:37,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-09-15 01:12:37,139 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:37,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:37,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2145285195, now seen corresponding path program 193 times [2020-09-15 01:12:37,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:37,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917752073] [2020-09-15 01:12:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:37,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917752073] [2020-09-15 01:12:37,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581588480] [2020-09-15 01:12:37,338 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:37,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:37,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:37,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:37,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:12:37,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593527479] [2020-09-15 01:12:37,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:12:37,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:37,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:12:37,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:37,754 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-15 01:12:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:39,386 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-09-15 01:12:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:12:39,388 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:12:39,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:39,388 INFO L225 Difference]: With dead ends: 265 [2020-09-15 01:12:39,388 INFO L226 Difference]: Without dead ends: 263 [2020-09-15 01:12:39,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=374, Invalid=958, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:12:39,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-09-15 01:12:39,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-09-15 01:12:39,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:12:39,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-15 01:12:39,392 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-15 01:12:39,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:39,392 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-15 01:12:39,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:12:39,393 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-15 01:12:39,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:39,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:39,393 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:39,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:39,594 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:39,594 INFO L82 PathProgramCache]: Analyzing trace with hash -2144622105, now seen corresponding path program 194 times [2020-09-15 01:12:39,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:39,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323734833] [2020-09-15 01:12:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:39,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323734833] [2020-09-15 01:12:39,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958767634] [2020-09-15 01:12:39,794 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:39,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:12:39,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:39,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:39,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:40,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:40,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:12:40,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25669210] [2020-09-15 01:12:40,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:12:40,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:40,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:12:40,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:40,198 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-15 01:12:42,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:42,144 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-09-15 01:12:42,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:12:42,146 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:12:42,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:42,146 INFO L225 Difference]: With dead ends: 262 [2020-09-15 01:12:42,146 INFO L226 Difference]: Without dead ends: 260 [2020-09-15 01:12:42,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=467, Invalid=1173, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:12:42,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-15 01:12:42,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-09-15 01:12:42,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:12:42,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-15 01:12:42,150 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-15 01:12:42,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:42,150 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-15 01:12:42,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:12:42,150 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-15 01:12:42,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:42,151 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:42,151 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:42,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-09-15 01:12:42,352 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:42,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:42,352 INFO L82 PathProgramCache]: Analyzing trace with hash -2144599785, now seen corresponding path program 195 times [2020-09-15 01:12:42,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:42,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27512770] [2020-09-15 01:12:42,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:42,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:42,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27512770] [2020-09-15 01:12:42,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794438754] [2020-09-15 01:12:42,581 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:42,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:12:42,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:42,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:42,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:42,946 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:12:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:42,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:42,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:12:42,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943219361] [2020-09-15 01:12:42,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:12:42,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:42,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:12:42,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:42,996 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-15 01:12:45,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:45,581 INFO L93 Difference]: Finished difference Result 285 states and 688 transitions. [2020-09-15 01:12:45,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:12:45,582 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:12:45,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:45,583 INFO L225 Difference]: With dead ends: 285 [2020-09-15 01:12:45,583 INFO L226 Difference]: Without dead ends: 280 [2020-09-15 01:12:45,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=604, Invalid=1466, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:12:45,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-15 01:12:45,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2020-09-15 01:12:45,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:12:45,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-15 01:12:45,587 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-15 01:12:45,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:45,587 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-15 01:12:45,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:12:45,587 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-15 01:12:45,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:45,588 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:45,588 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:45,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:45,789 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:45,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:45,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2144570955, now seen corresponding path program 196 times [2020-09-15 01:12:45,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:45,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856937129] [2020-09-15 01:12:45,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:45,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856937129] [2020-09-15 01:12:45,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842440915] [2020-09-15 01:12:45,996 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:46,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:12:46,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:46,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:46,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:50,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:12:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:52,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:52,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-15 01:12:52,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979924396] [2020-09-15 01:12:52,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:12:52,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:52,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:12:52,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=223, Unknown=3, NotChecked=0, Total=306 [2020-09-15 01:12:52,595 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-09-15 01:12:56,885 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-09-15 01:12:59,053 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-09-15 01:12:59,416 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 16 [2020-09-15 01:13:03,711 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-09-15 01:13:07,958 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-09-15 01:13:12,443 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-09-15 01:13:14,663 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-09-15 01:13:23,791 WARN L193 SmtUtils]: Spent 4.29 s on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2020-09-15 01:13:26,308 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-09-15 01:14:07,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:07,351 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-09-15 01:14:07,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:14:07,353 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-09-15 01:14:07,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:07,353 INFO L225 Difference]: With dead ends: 302 [2020-09-15 01:14:07,354 INFO L226 Difference]: Without dead ends: 297 [2020-09-15 01:14:07,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 44.3s TimeCoverageRelationStatistics Valid=583, Invalid=1480, Unknown=7, NotChecked=0, Total=2070 [2020-09-15 01:14:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-09-15 01:14:07,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 166. [2020-09-15 01:14:07,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:14:07,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-09-15 01:14:07,358 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-09-15 01:14:07,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:07,358 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-09-15 01:14:07,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:14:07,358 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-09-15 01:14:07,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:07,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:07,358 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:07,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-09-15 01:14:07,559 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:07,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:07,560 INFO L82 PathProgramCache]: Analyzing trace with hash -2143668793, now seen corresponding path program 197 times [2020-09-15 01:14:07,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:07,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125468139] [2020-09-15 01:14:07,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:07,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125468139] [2020-09-15 01:14:07,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892952291] [2020-09-15 01:14:07,790 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:07,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:14:07,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:07,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:07,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:08,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:08,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:08,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184118167] [2020-09-15 01:14:08,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:08,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:08,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:08,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:08,136 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-09-15 01:14:09,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:09,001 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-09-15 01:14:09,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:14:09,004 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:09,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:09,010 INFO L225 Difference]: With dead ends: 219 [2020-09-15 01:14:09,010 INFO L226 Difference]: Without dead ends: 217 [2020-09-15 01:14:09,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:14:09,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-15 01:14:09,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-09-15 01:14:09,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:14:09,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-15 01:14:09,013 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-15 01:14:09,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:09,013 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-15 01:14:09,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:09,014 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-15 01:14:09,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:09,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:09,014 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:09,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:09,215 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:09,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:09,216 INFO L82 PathProgramCache]: Analyzing trace with hash -2143646473, now seen corresponding path program 198 times [2020-09-15 01:14:09,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:09,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520936864] [2020-09-15 01:14:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:09,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520936864] [2020-09-15 01:14:09,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892806126] [2020-09-15 01:14:09,456 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:09,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:14:09,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:09,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:09,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:09,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:09,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:09,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:09,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690259209] [2020-09-15 01:14:09,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:09,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:09,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:09,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:09,837 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-15 01:14:10,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:10,944 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-09-15 01:14:10,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:14:10,945 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:10,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:10,946 INFO L225 Difference]: With dead ends: 229 [2020-09-15 01:14:10,946 INFO L226 Difference]: Without dead ends: 224 [2020-09-15 01:14:10,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=270, Invalid=600, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:14:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-15 01:14:10,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-09-15 01:14:10,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-15 01:14:10,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-09-15 01:14:10,949 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-09-15 01:14:10,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:10,949 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-09-15 01:14:10,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:10,949 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-09-15 01:14:10,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:10,950 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:10,950 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:11,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:11,150 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:11,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:11,151 INFO L82 PathProgramCache]: Analyzing trace with hash -255670682, now seen corresponding path program 199 times [2020-09-15 01:14:11,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:11,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018572487] [2020-09-15 01:14:11,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:11,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018572487] [2020-09-15 01:14:11,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294121776] [2020-09-15 01:14:11,402 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:11,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:11,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:11,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:11,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:11,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256972924] [2020-09-15 01:14:11,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:11,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:11,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:11,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:11,897 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-09-15 01:14:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:12,968 INFO L93 Difference]: Finished difference Result 227 states and 524 transitions. [2020-09-15 01:14:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:14:12,972 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:12,972 INFO L225 Difference]: With dead ends: 227 [2020-09-15 01:14:12,972 INFO L226 Difference]: Without dead ends: 225 [2020-09-15 01:14:12,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:14:12,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-15 01:14:12,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 161. [2020-09-15 01:14:12,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-15 01:14:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-09-15 01:14:12,977 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-09-15 01:14:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:12,977 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-09-15 01:14:12,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:12,977 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-09-15 01:14:12,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:12,978 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:12,978 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:13,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-09-15 01:14:13,179 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:13,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:13,179 INFO L82 PathProgramCache]: Analyzing trace with hash -255669721, now seen corresponding path program 200 times [2020-09-15 01:14:13,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:13,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012083569] [2020-09-15 01:14:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:13,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012083569] [2020-09-15 01:14:13,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923566524] [2020-09-15 01:14:13,425 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:13,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:14:13,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:13,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:13,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:13,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:13,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:13,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606318811] [2020-09-15 01:14:13,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:13,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:13,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:13,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:13,945 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-09-15 01:14:14,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:14,937 INFO L93 Difference]: Finished difference Result 231 states and 533 transitions. [2020-09-15 01:14:14,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:14:14,939 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:14,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:14,940 INFO L225 Difference]: With dead ends: 231 [2020-09-15 01:14:14,940 INFO L226 Difference]: Without dead ends: 229 [2020-09-15 01:14:14,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=226, Invalid=586, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:14:14,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-09-15 01:14:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 160. [2020-09-15 01:14:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-15 01:14:14,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-09-15 01:14:14,943 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-09-15 01:14:14,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:14,943 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-09-15 01:14:14,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:14,943 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-09-15 01:14:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:14,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:14,944 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:15,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:15,145 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:15,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:15,145 INFO L82 PathProgramCache]: Analyzing trace with hash -255640891, now seen corresponding path program 201 times [2020-09-15 01:14:15,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:15,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547091371] [2020-09-15 01:14:15,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:15,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547091371] [2020-09-15 01:14:15,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822184878] [2020-09-15 01:14:15,389 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:15,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:14:15,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:15,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:15,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:16,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:16,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:16,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998904727] [2020-09-15 01:14:16,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:16,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:16,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:16,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:16,148 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-09-15 01:14:17,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:17,368 INFO L93 Difference]: Finished difference Result 244 states and 558 transitions. [2020-09-15 01:14:17,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:14:17,370 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:17,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:17,370 INFO L225 Difference]: With dead ends: 244 [2020-09-15 01:14:17,371 INFO L226 Difference]: Without dead ends: 242 [2020-09-15 01:14:17,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=264, Invalid=666, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:14:17,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-09-15 01:14:17,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 164. [2020-09-15 01:14:17,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:14:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-09-15 01:14:17,374 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-09-15 01:14:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:17,374 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-09-15 01:14:17,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-09-15 01:14:17,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:17,375 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:17,375 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:17,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-09-15 01:14:17,577 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:17,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:17,578 INFO L82 PathProgramCache]: Analyzing trace with hash -254746200, now seen corresponding path program 202 times [2020-09-15 01:14:17,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:17,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114099193] [2020-09-15 01:14:17,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:17,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114099193] [2020-09-15 01:14:17,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282227740] [2020-09-15 01:14:17,794 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:17,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:14:17,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:17,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:17,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:18,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:18,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:18,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485060115] [2020-09-15 01:14:18,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:18,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:18,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:18,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:18,249 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-09-15 01:14:19,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:19,093 INFO L93 Difference]: Finished difference Result 236 states and 543 transitions. [2020-09-15 01:14:19,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:14:19,094 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:19,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:19,095 INFO L225 Difference]: With dead ends: 236 [2020-09-15 01:14:19,095 INFO L226 Difference]: Without dead ends: 234 [2020-09-15 01:14:19,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:14:19,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-09-15 01:14:19,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-09-15 01:14:19,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:14:19,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-09-15 01:14:19,098 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-09-15 01:14:19,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:19,099 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-09-15 01:14:19,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:19,099 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-09-15 01:14:19,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:19,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:19,099 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:19,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-09-15 01:14:19,300 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:19,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:19,301 INFO L82 PathProgramCache]: Analyzing trace with hash -227041531, now seen corresponding path program 203 times [2020-09-15 01:14:19,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:19,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929882438] [2020-09-15 01:14:19,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:19,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929882438] [2020-09-15 01:14:19,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069130247] [2020-09-15 01:14:19,512 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:19,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:14:19,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:19,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:19,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:20,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:20,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:20,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:20,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113172774] [2020-09-15 01:14:20,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:20,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:20,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:20,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:20,045 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-09-15 01:14:21,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:21,166 INFO L93 Difference]: Finished difference Result 241 states and 553 transitions. [2020-09-15 01:14:21,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:14:21,167 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:21,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:21,168 INFO L225 Difference]: With dead ends: 241 [2020-09-15 01:14:21,168 INFO L226 Difference]: Without dead ends: 239 [2020-09-15 01:14:21,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:14:21,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-15 01:14:21,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 162. [2020-09-15 01:14:21,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:14:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-09-15 01:14:21,172 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-09-15 01:14:21,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:21,172 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-09-15 01:14:21,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:21,172 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-09-15 01:14:21,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:21,173 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:21,173 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:21,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-09-15 01:14:21,374 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:21,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:21,374 INFO L82 PathProgramCache]: Analyzing trace with hash -226088219, now seen corresponding path program 204 times [2020-09-15 01:14:21,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:21,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630763572] [2020-09-15 01:14:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:21,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630763572] [2020-09-15 01:14:21,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884574667] [2020-09-15 01:14:21,588 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:21,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:14:21,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:21,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:21,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:22,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:22,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:22,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259381709] [2020-09-15 01:14:22,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:22,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:22,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:22,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:22,076 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-09-15 01:14:23,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:23,079 INFO L93 Difference]: Finished difference Result 226 states and 520 transitions. [2020-09-15 01:14:23,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:14:23,082 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:23,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:23,082 INFO L225 Difference]: With dead ends: 226 [2020-09-15 01:14:23,083 INFO L226 Difference]: Without dead ends: 224 [2020-09-15 01:14:23,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:14:23,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-15 01:14:23,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 156. [2020-09-15 01:14:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-15 01:14:23,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-09-15 01:14:23,086 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-09-15 01:14:23,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:23,086 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-09-15 01:14:23,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:23,086 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-09-15 01:14:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:23,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:23,087 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:23,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-09-15 01:14:23,288 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:23,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:23,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392972, now seen corresponding path program 205 times [2020-09-15 01:14:23,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:23,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454373624] [2020-09-15 01:14:23,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:23,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454373624] [2020-09-15 01:14:23,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100724592] [2020-09-15 01:14:23,510 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:23,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:23,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:23,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:23,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:23,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113336351] [2020-09-15 01:14:23,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:23,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:23,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:23,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:23,952 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-09-15 01:14:25,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:25,554 INFO L93 Difference]: Finished difference Result 253 states and 578 transitions. [2020-09-15 01:14:25,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:14:25,556 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:25,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:25,557 INFO L225 Difference]: With dead ends: 253 [2020-09-15 01:14:25,557 INFO L226 Difference]: Without dead ends: 251 [2020-09-15 01:14:25,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=447, Invalid=1193, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:14:25,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-15 01:14:25,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 160. [2020-09-15 01:14:25,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-15 01:14:25,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-09-15 01:14:25,561 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-09-15 01:14:25,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:25,561 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-09-15 01:14:25,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:25,561 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-09-15 01:14:25,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:25,566 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:25,566 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:25,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-09-15 01:14:25,767 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:25,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:25,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392011, now seen corresponding path program 206 times [2020-09-15 01:14:25,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:25,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018758526] [2020-09-15 01:14:25,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:26,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018758526] [2020-09-15 01:14:26,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277598414] [2020-09-15 01:14:26,021 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:26,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:14:26,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:26,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:26,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:26,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:26,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:26,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660872871] [2020-09-15 01:14:26,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:26,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:26,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:26,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:26,480 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-09-15 01:14:28,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:28,096 INFO L93 Difference]: Finished difference Result 249 states and 570 transitions. [2020-09-15 01:14:28,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:14:28,099 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:28,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:28,099 INFO L225 Difference]: With dead ends: 249 [2020-09-15 01:14:28,099 INFO L226 Difference]: Without dead ends: 247 [2020-09-15 01:14:28,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=357, Invalid=975, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:14:28,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-09-15 01:14:28,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 159. [2020-09-15 01:14:28,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-15 01:14:28,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-09-15 01:14:28,103 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-09-15 01:14:28,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:28,103 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-09-15 01:14:28,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:28,103 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-09-15 01:14:28,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:28,103 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:28,104 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:28,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:28,304 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:28,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:28,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1976363181, now seen corresponding path program 207 times [2020-09-15 01:14:28,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:28,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200295570] [2020-09-15 01:14:28,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:28,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200295570] [2020-09-15 01:14:28,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238527759] [2020-09-15 01:14:28,528 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:28,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:14:28,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:28,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:28,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:29,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:29,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:29,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265337437] [2020-09-15 01:14:29,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:29,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:29,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:29,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:29,169 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-09-15 01:14:30,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:30,971 INFO L93 Difference]: Finished difference Result 271 states and 615 transitions. [2020-09-15 01:14:30,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:14:30,974 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:30,975 INFO L225 Difference]: With dead ends: 271 [2020-09-15 01:14:30,975 INFO L226 Difference]: Without dead ends: 269 [2020-09-15 01:14:30,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=394, Invalid=1012, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:14:30,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-15 01:14:30,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 163. [2020-09-15 01:14:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:14:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-09-15 01:14:30,978 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-09-15 01:14:30,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:30,978 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-09-15 01:14:30,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:30,978 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-09-15 01:14:30,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:30,978 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:30,979 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:31,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:31,179 INFO L427 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:31,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:31,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1975468490, now seen corresponding path program 208 times [2020-09-15 01:14:31,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:31,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567653301] [2020-09-15 01:14:31,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:31,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567653301] [2020-09-15 01:14:31,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293352930] [2020-09-15 01:14:31,423 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:31,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:14:31,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:31,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:31,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:31,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:31,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:31,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340060741] [2020-09-15 01:14:31,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:31,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:31,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:31,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:31,927 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-09-15 01:14:33,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:33,222 INFO L93 Difference]: Finished difference Result 241 states and 554 transitions. [2020-09-15 01:14:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:14:33,224 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:33,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:33,225 INFO L225 Difference]: With dead ends: 241 [2020-09-15 01:14:33,225 INFO L226 Difference]: Without dead ends: 239 [2020-09-15 01:14:33,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:14:33,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-15 01:14:33,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 162. [2020-09-15 01:14:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:14:33,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-09-15 01:14:33,228 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-09-15 01:14:33,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:33,229 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-09-15 01:14:33,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:33,229 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-09-15 01:14:33,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:33,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:33,229 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:33,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:33,430 INFO L427 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:33,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:33,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1339163482, now seen corresponding path program 209 times [2020-09-15 01:14:33,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:33,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894086119] [2020-09-15 01:14:33,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:33,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894086119] [2020-09-15 01:14:33,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919165464] [2020-09-15 01:14:33,655 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:33,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:14:33,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:33,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:33,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:34,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:34,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:34,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244424709] [2020-09-15 01:14:34,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:34,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:34,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:34,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:34,118 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-09-15 01:14:36,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:36,074 INFO L93 Difference]: Finished difference Result 266 states and 612 transitions. [2020-09-15 01:14:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:14:36,077 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:36,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:36,077 INFO L225 Difference]: With dead ends: 266 [2020-09-15 01:14:36,078 INFO L226 Difference]: Without dead ends: 264 [2020-09-15 01:14:36,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=535, Invalid=1357, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:14:36,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-09-15 01:14:36,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 164. [2020-09-15 01:14:36,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:14:36,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-09-15 01:14:36,082 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-09-15 01:14:36,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:36,082 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-09-15 01:14:36,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:36,082 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-09-15 01:14:36,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:36,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:36,082 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:36,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:36,283 INFO L427 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:36,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:36,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1339162521, now seen corresponding path program 210 times [2020-09-15 01:14:36,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:36,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266763799] [2020-09-15 01:14:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:36,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266763799] [2020-09-15 01:14:36,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954986238] [2020-09-15 01:14:36,526 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:36,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:14:36,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:36,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:36,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:37,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:37,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:37,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321839041] [2020-09-15 01:14:37,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:37,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:37,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:37,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:37,001 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-09-15 01:14:38,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:38,808 INFO L93 Difference]: Finished difference Result 256 states and 592 transitions. [2020-09-15 01:14:38,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:14:38,811 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:38,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:38,811 INFO L225 Difference]: With dead ends: 256 [2020-09-15 01:14:38,811 INFO L226 Difference]: Without dead ends: 254 [2020-09-15 01:14:38,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=418, Invalid=1064, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:14:38,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-15 01:14:38,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 164. [2020-09-15 01:14:38,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:14:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-09-15 01:14:38,819 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-09-15 01:14:38,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:38,819 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-09-15 01:14:38,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:38,819 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-09-15 01:14:38,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:38,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:38,819 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:39,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:39,020 INFO L427 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:39,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:39,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1339133691, now seen corresponding path program 211 times [2020-09-15 01:14:39,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:39,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733466731] [2020-09-15 01:14:39,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:39,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733466731] [2020-09-15 01:14:39,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809735566] [2020-09-15 01:14:39,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:39,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:39,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:39,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:39,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:39,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880706154] [2020-09-15 01:14:39,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:39,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:39,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:39,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:39,893 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-09-15 01:14:41,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:41,740 INFO L93 Difference]: Finished difference Result 263 states and 606 transitions. [2020-09-15 01:14:41,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:14:41,743 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:41,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:41,744 INFO L225 Difference]: With dead ends: 263 [2020-09-15 01:14:41,744 INFO L226 Difference]: Without dead ends: 261 [2020-09-15 01:14:41,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:14:41,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-09-15 01:14:41,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 165. [2020-09-15 01:14:41,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-15 01:14:41,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-09-15 01:14:41,752 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-09-15 01:14:41,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:41,753 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-09-15 01:14:41,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:41,753 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-09-15 01:14:41,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:41,753 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:41,753 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:41,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2020-09-15 01:14:41,954 INFO L427 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:41,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:41,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1318607692, now seen corresponding path program 212 times [2020-09-15 01:14:41,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:41,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130487529] [2020-09-15 01:14:41,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:42,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130487529] [2020-09-15 01:14:42,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037481294] [2020-09-15 01:14:42,170 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:42,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:14:42,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:42,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:42,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:42,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:42,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:42,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896444160] [2020-09-15 01:14:42,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:42,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:42,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:42,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:42,715 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-09-15 01:14:44,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:44,902 INFO L93 Difference]: Finished difference Result 266 states and 625 transitions. [2020-09-15 01:14:44,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:14:44,903 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:44,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:44,904 INFO L225 Difference]: With dead ends: 266 [2020-09-15 01:14:44,904 INFO L226 Difference]: Without dead ends: 264 [2020-09-15 01:14:44,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=588, Invalid=1392, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:14:44,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-09-15 01:14:44,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 166. [2020-09-15 01:14:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:14:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-09-15 01:14:44,908 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-09-15 01:14:44,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:44,909 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-09-15 01:14:44,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:44,909 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-09-15 01:14:44,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:44,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:44,909 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:45,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-09-15 01:14:45,110 INFO L427 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:45,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:45,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1318606731, now seen corresponding path program 213 times [2020-09-15 01:14:45,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:45,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180327812] [2020-09-15 01:14:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:45,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180327812] [2020-09-15 01:14:45,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392445884] [2020-09-15 01:14:45,391 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:45,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:14:45,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:45,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:45,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:45,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:45,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:45,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345343283] [2020-09-15 01:14:45,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:45,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:45,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:45,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:45,873 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-09-15 01:14:47,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:47,828 INFO L93 Difference]: Finished difference Result 250 states and 588 transitions. [2020-09-15 01:14:47,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:14:47,831 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:47,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:47,831 INFO L225 Difference]: With dead ends: 250 [2020-09-15 01:14:47,832 INFO L226 Difference]: Without dead ends: 248 [2020-09-15 01:14:47,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=450, Invalid=1110, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:14:47,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-15 01:14:47,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 167. [2020-09-15 01:14:47,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:14:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-15 01:14:47,836 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-15 01:14:47,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:47,836 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-15 01:14:47,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:47,836 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-15 01:14:47,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:47,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:47,837 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:48,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-09-15 01:14:48,038 INFO L427 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:48,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:48,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1317944602, now seen corresponding path program 214 times [2020-09-15 01:14:48,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:48,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842109442] [2020-09-15 01:14:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:48,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:48,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842109442] [2020-09-15 01:14:48,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602303694] [2020-09-15 01:14:48,349 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:48,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:14:48,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:48,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:48,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:48,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:48,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:48,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:48,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071448288] [2020-09-15 01:14:48,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:48,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:48,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:48,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:48,827 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-15 01:14:51,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:51,142 INFO L93 Difference]: Finished difference Result 255 states and 608 transitions. [2020-09-15 01:14:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:14:51,146 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:51,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:51,147 INFO L225 Difference]: With dead ends: 255 [2020-09-15 01:14:51,147 INFO L226 Difference]: Without dead ends: 253 [2020-09-15 01:14:51,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:14:51,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-15 01:14:51,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 169. [2020-09-15 01:14:51,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:14:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-15 01:14:51,150 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-15 01:14:51,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:51,150 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-15 01:14:51,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:51,150 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-15 01:14:51,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:51,151 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:51,151 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:51,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:51,352 INFO L427 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:51,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:51,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1317923243, now seen corresponding path program 215 times [2020-09-15 01:14:51,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:51,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151440246] [2020-09-15 01:14:51,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:51,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151440246] [2020-09-15 01:14:51,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445214877] [2020-09-15 01:14:51,652 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:51,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:14:51,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:51,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:51,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:52,063 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:14:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:52,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:52,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:52,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125261570] [2020-09-15 01:14:52,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:52,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:52,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:52,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:52,094 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-15 01:14:53,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:53,888 INFO L93 Difference]: Finished difference Result 228 states and 552 transitions. [2020-09-15 01:14:53,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:14:53,891 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:53,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:53,891 INFO L225 Difference]: With dead ends: 228 [2020-09-15 01:14:53,892 INFO L226 Difference]: Without dead ends: 223 [2020-09-15 01:14:53,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=520, Invalid=1120, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:14:53,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-15 01:14:53,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 169. [2020-09-15 01:14:53,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:14:53,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-15 01:14:53,896 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-15 01:14:53,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:53,897 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-15 01:14:53,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:53,897 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-15 01:14:53,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:53,898 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:53,898 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:54,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2020-09-15 01:14:54,102 INFO L427 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:54,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:54,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1317922282, now seen corresponding path program 216 times [2020-09-15 01:14:54,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:54,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427635346] [2020-09-15 01:14:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:54,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427635346] [2020-09-15 01:14:54,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944697987] [2020-09-15 01:14:54,352 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:54,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:14:54,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:54,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:14:54,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:54,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:54,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:54,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524261364] [2020-09-15 01:14:54,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:54,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:54,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:54,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:54,678 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-15 01:14:56,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:56,920 INFO L93 Difference]: Finished difference Result 276 states and 660 transitions. [2020-09-15 01:14:56,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:14:56,923 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:56,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:56,924 INFO L225 Difference]: With dead ends: 276 [2020-09-15 01:14:56,924 INFO L226 Difference]: Without dead ends: 271 [2020-09-15 01:14:56,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=379, Invalid=1103, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:14:56,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-09-15 01:14:56,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 167. [2020-09-15 01:14:56,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:14:56,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-15 01:14:56,928 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-15 01:14:56,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:56,928 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-15 01:14:56,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:56,928 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-15 01:14:56,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:56,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:56,929 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:57,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-09-15 01:14:57,130 INFO L427 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:57,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:57,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1317914811, now seen corresponding path program 217 times [2020-09-15 01:14:57,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:57,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105417119] [2020-09-15 01:14:57,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:57,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105417119] [2020-09-15 01:14:57,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344493769] [2020-09-15 01:14:57,335 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:57,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:57,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:57,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:57,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:57,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544320024] [2020-09-15 01:14:57,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:57,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:57,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:57,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:57,842 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-15 01:15:00,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:00,134 INFO L93 Difference]: Finished difference Result 267 states and 637 transitions. [2020-09-15 01:15:00,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:15:00,137 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:15:00,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:00,138 INFO L225 Difference]: With dead ends: 267 [2020-09-15 01:15:00,138 INFO L226 Difference]: Without dead ends: 265 [2020-09-15 01:15:00,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=480, Invalid=1242, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:15:00,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-09-15 01:15:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 169. [2020-09-15 01:15:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:15:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-15 01:15:00,141 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-15 01:15:00,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:00,142 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-15 01:15:00,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:15:00,142 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-15 01:15:00,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:15:00,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:00,142 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:00,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:00,343 INFO L427 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:00,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:00,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1317893452, now seen corresponding path program 218 times [2020-09-15 01:15:00,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:00,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54014146] [2020-09-15 01:15:00,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:00,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54014146] [2020-09-15 01:15:00,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572151261] [2020-09-15 01:15:00,642 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:00,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:15:00,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:00,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:15:00,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:01,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:15:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:01,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:01,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:15:01,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738657647] [2020-09-15 01:15:01,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:15:01,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:01,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:15:01,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:15:01,227 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-15 01:15:04,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:04,521 INFO L93 Difference]: Finished difference Result 295 states and 712 transitions. [2020-09-15 01:15:04,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:15:04,523 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:15:04,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:04,524 INFO L225 Difference]: With dead ends: 295 [2020-09-15 01:15:04,524 INFO L226 Difference]: Without dead ends: 290 [2020-09-15 01:15:04,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=628, Invalid=1534, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:15:04,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-15 01:15:04,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-09-15 01:15:04,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:15:04,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-15 01:15:04,528 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-15 01:15:04,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:04,528 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-15 01:15:04,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:15:04,528 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-15 01:15:04,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:15:04,529 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:04,529 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:04,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:04,730 INFO L427 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:04,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:04,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1317892491, now seen corresponding path program 219 times [2020-09-15 01:15:04,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:04,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913689990] [2020-09-15 01:15:04,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:05,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913689990] [2020-09-15 01:15:05,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203774502] [2020-09-15 01:15:05,042 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:05,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:15:05,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:05,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:15:05,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:05,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:05,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-15 01:15:05,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790460468] [2020-09-15 01:15:05,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:15:05,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:05,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:15:05,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:15:05,507 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 18 states. [2020-09-15 01:15:08,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:08,453 INFO L93 Difference]: Finished difference Result 303 states and 720 transitions. [2020-09-15 01:15:08,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:15:08,457 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-09-15 01:15:08,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:08,458 INFO L225 Difference]: With dead ends: 303 [2020-09-15 01:15:08,458 INFO L226 Difference]: Without dead ends: 298 [2020-09-15 01:15:08,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=424, Invalid=1468, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:15:08,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-09-15 01:15:08,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 165. [2020-09-15 01:15:08,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-15 01:15:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-09-15 01:15:08,462 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-09-15 01:15:08,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:08,462 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-09-15 01:15:08,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:15:08,462 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-09-15 01:15:08,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:15:08,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:08,467 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:08,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:08,668 INFO L427 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:08,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:08,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1317684171, now seen corresponding path program 220 times [2020-09-15 01:15:08,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:08,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455118264] [2020-09-15 01:15:08,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:08,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455118264] [2020-09-15 01:15:08,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114349093] [2020-09-15 01:15:08,936 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:08,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:15:08,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:08,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:15:08,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:09,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:09,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:15:09,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369337968] [2020-09-15 01:15:09,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:15:09,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:09,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:15:09,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:15:09,551 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-09-15 01:15:12,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:12,266 INFO L93 Difference]: Finished difference Result 283 states and 656 transitions. [2020-09-15 01:15:12,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:15:12,276 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:15:12,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:12,278 INFO L225 Difference]: With dead ends: 283 [2020-09-15 01:15:12,278 INFO L226 Difference]: Without dead ends: 281 [2020-09-15 01:15:12,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=443, Invalid=1197, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:15:12,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-09-15 01:15:12,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 169. [2020-09-15 01:15:12,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:15:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-15 01:15:12,285 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-15 01:15:12,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:12,286 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-15 01:15:12,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:15:12,286 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-15 01:15:12,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:15:12,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:12,287 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:12,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:12,489 INFO L427 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:12,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:12,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1317021081, now seen corresponding path program 221 times [2020-09-15 01:15:12,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:12,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733029928] [2020-09-15 01:15:12,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:12,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733029928] [2020-09-15 01:15:12,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578256449] [2020-09-15 01:15:12,732 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:12,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:15:12,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:12,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:15:12,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:13,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:13,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:15:13,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425724167] [2020-09-15 01:15:13,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:15:13,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:13,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:15:13,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:15:13,376 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-15 01:15:16,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:16,393 INFO L93 Difference]: Finished difference Result 278 states and 665 transitions. [2020-09-15 01:15:16,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:15:16,398 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:15:16,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:16,399 INFO L225 Difference]: With dead ends: 278 [2020-09-15 01:15:16,399 INFO L226 Difference]: Without dead ends: 276 [2020-09-15 01:15:16,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=539, Invalid=1353, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:15:16,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-09-15 01:15:16,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 174. [2020-09-15 01:15:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-15 01:15:16,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-09-15 01:15:16,403 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-09-15 01:15:16,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:16,403 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-09-15 01:15:16,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:15:16,403 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-09-15 01:15:16,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:15:16,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:16,404 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:16,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2020-09-15 01:15:16,613 INFO L427 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:16,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:16,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1316999722, now seen corresponding path program 222 times [2020-09-15 01:15:16,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:16,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718024304] [2020-09-15 01:15:16,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:16,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718024304] [2020-09-15 01:15:16,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432080492] [2020-09-15 01:15:16,914 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:16,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:15:16,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:15:16,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:17,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:15:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:17,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:17,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:15:17,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874818899] [2020-09-15 01:15:17,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:15:17,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:17,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:15:17,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:15:17,541 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-09-15 01:15:21,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:21,035 INFO L93 Difference]: Finished difference Result 318 states and 774 transitions. [2020-09-15 01:15:21,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:15:21,040 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:15:21,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:21,042 INFO L225 Difference]: With dead ends: 318 [2020-09-15 01:15:21,042 INFO L226 Difference]: Without dead ends: 310 [2020-09-15 01:15:21,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=644, Invalid=1612, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:15:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-09-15 01:15:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 176. [2020-09-15 01:15:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-15 01:15:21,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2020-09-15 01:15:21,047 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 14 [2020-09-15 01:15:21,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:21,047 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2020-09-15 01:15:21,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:15:21,047 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2020-09-15 01:15:21,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:15:21,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:21,048 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:21,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-09-15 01:15:21,253 INFO L427 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:21,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:21,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1316998761, now seen corresponding path program 223 times [2020-09-15 01:15:21,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:21,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141156269] [2020-09-15 01:15:21,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:21,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141156269] [2020-09-15 01:15:21,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277492525] [2020-09-15 01:15:21,561 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:21,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:15:21,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:26,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:15:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:26,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:26,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:15:26,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771429879] [2020-09-15 01:15:26,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:15:26,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:26,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:15:26,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=199, Unknown=2, NotChecked=0, Total=272 [2020-09-15 01:15:26,222 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand 17 states. [2020-09-15 01:15:27,053 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 22 [2020-09-15 01:15:31,447 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-09-15 01:15:35,701 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-09-15 01:15:40,258 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-09-15 01:15:44,686 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-09-15 01:15:44,870 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-09-15 01:15:49,096 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-09-15 01:15:51,622 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-09-15 01:15:55,871 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-09-15 01:15:58,644 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-09-15 01:16:03,349 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-09-15 01:16:03,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:03,944 INFO L93 Difference]: Finished difference Result 316 states and 769 transitions. [2020-09-15 01:16:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:16:03,948 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:16:03,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:03,949 INFO L225 Difference]: With dead ends: 316 [2020-09-15 01:16:03,949 INFO L226 Difference]: Without dead ends: 308 [2020-09-15 01:16:03,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 41.4s TimeCoverageRelationStatistics Valid=664, Invalid=1686, Unknown=2, NotChecked=0, Total=2352 [2020-09-15 01:16:03,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-09-15 01:16:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 171. [2020-09-15 01:16:03,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-15 01:16:03,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-09-15 01:16:03,954 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-09-15 01:16:03,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:03,954 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-09-15 01:16:03,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:16:03,955 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-09-15 01:16:03,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:03,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:03,955 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:04,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-09-15 01:16:04,170 INFO L427 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:04,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:04,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1316969931, now seen corresponding path program 224 times [2020-09-15 01:16:04,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:04,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810539267] [2020-09-15 01:16:04,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:04,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810539267] [2020-09-15 01:16:04,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461848767] [2020-09-15 01:16:04,499 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:04,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:16:04,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:04,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:16:04,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:05,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:16:05,086 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:16:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:05,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:05,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:16:05,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932697212] [2020-09-15 01:16:05,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:16:05,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:05,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:16:05,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:16:05,212 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-09-15 01:16:09,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:09,626 INFO L93 Difference]: Finished difference Result 318 states and 769 transitions. [2020-09-15 01:16:09,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:16:09,630 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:16:09,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:09,631 INFO L225 Difference]: With dead ends: 318 [2020-09-15 01:16:09,631 INFO L226 Difference]: Without dead ends: 310 [2020-09-15 01:16:09,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=648, Invalid=1608, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:16:09,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-09-15 01:16:09,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 170. [2020-09-15 01:16:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-15 01:16:09,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 431 transitions. [2020-09-15 01:16:09,636 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 431 transitions. Word has length 14 [2020-09-15 01:16:09,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:09,636 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 431 transitions. [2020-09-15 01:16:09,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:16:09,636 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 431 transitions. [2020-09-15 01:16:09,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:09,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:09,637 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:09,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-09-15 01:16:09,841 INFO L427 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:09,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1310533370, now seen corresponding path program 225 times [2020-09-15 01:16:09,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:09,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360847404] [2020-09-15 01:16:09,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:10,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360847404] [2020-09-15 01:16:10,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422690392] [2020-09-15 01:16:10,130 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:10,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:16:10,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:10,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:16:10,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:10,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:10,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:16:10,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59716682] [2020-09-15 01:16:10,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:16:10,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:10,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:16:10,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:16:10,698 INFO L87 Difference]: Start difference. First operand 170 states and 431 transitions. Second operand 17 states. [2020-09-15 01:16:12,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:12,528 INFO L93 Difference]: Finished difference Result 261 states and 613 transitions. [2020-09-15 01:16:12,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:16:12,532 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:16:12,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:12,533 INFO L225 Difference]: With dead ends: 261 [2020-09-15 01:16:12,533 INFO L226 Difference]: Without dead ends: 259 [2020-09-15 01:16:12,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=329, Invalid=931, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:16:12,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-15 01:16:12,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 168. [2020-09-15 01:16:12,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-15 01:16:12,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 425 transitions. [2020-09-15 01:16:12,536 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 425 transitions. Word has length 14 [2020-09-15 01:16:12,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:12,537 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 425 transitions. [2020-09-15 01:16:12,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:16:12,537 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 425 transitions. [2020-09-15 01:16:12,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:12,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:12,537 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:12,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-09-15 01:16:12,739 INFO L427 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:12,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:12,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1289978541, now seen corresponding path program 226 times [2020-09-15 01:16:12,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:12,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726062841] [2020-09-15 01:16:12,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:12,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726062841] [2020-09-15 01:16:12,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038386837] [2020-09-15 01:16:12,994 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:13,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:16:13,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:13,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:16:13,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:13,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:13,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:16:13,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898500266] [2020-09-15 01:16:13,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:16:13,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:13,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:16:13,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:16:13,492 INFO L87 Difference]: Start difference. First operand 168 states and 425 transitions. Second operand 17 states. [2020-09-15 01:16:16,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:16,048 INFO L93 Difference]: Finished difference Result 280 states and 660 transitions. [2020-09-15 01:16:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:16:16,050 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:16:16,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:16,051 INFO L225 Difference]: With dead ends: 280 [2020-09-15 01:16:16,051 INFO L226 Difference]: Without dead ends: 278 [2020-09-15 01:16:16,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=540, Invalid=1352, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:16:16,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-09-15 01:16:16,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 166. [2020-09-15 01:16:16,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:16:16,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 423 transitions. [2020-09-15 01:16:16,054 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 423 transitions. Word has length 14 [2020-09-15 01:16:16,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:16,055 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 423 transitions. [2020-09-15 01:16:16,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:16:16,055 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 423 transitions. [2020-09-15 01:16:16,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:16,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:16,055 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:16,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:16,256 INFO L427 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:16,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:16,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1289977580, now seen corresponding path program 227 times [2020-09-15 01:16:16,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:16,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436972021] [2020-09-15 01:16:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:16,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436972021] [2020-09-15 01:16:16,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756781995] [2020-09-15 01:16:16,552 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:16,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:16:16,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:16,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:16:16,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:17,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:17,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:16:17,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097850390] [2020-09-15 01:16:17,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:16:17,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:17,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:16:17,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:16:17,069 INFO L87 Difference]: Start difference. First operand 166 states and 423 transitions. Second operand 17 states. [2020-09-15 01:16:19,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:19,337 INFO L93 Difference]: Finished difference Result 251 states and 596 transitions. [2020-09-15 01:16:19,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:16:19,341 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:16:19,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:19,341 INFO L225 Difference]: With dead ends: 251 [2020-09-15 01:16:19,341 INFO L226 Difference]: Without dead ends: 249 [2020-09-15 01:16:19,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=382, Invalid=1024, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:16:19,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-09-15 01:16:19,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 164. [2020-09-15 01:16:19,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:16:19,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-09-15 01:16:19,345 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-09-15 01:16:19,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:19,345 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-09-15 01:16:19,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:16:19,345 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-09-15 01:16:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:19,346 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:19,346 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:19,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:19,547 INFO L427 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:19,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1289315451, now seen corresponding path program 228 times [2020-09-15 01:16:19,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:19,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809708180] [2020-09-15 01:16:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:19,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809708180] [2020-09-15 01:16:19,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951529655] [2020-09-15 01:16:19,866 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:19,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:16:19,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:19,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:16:19,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:20,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:20,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:16:20,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806216935] [2020-09-15 01:16:20,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:16:20,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:20,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:16:20,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:16:20,443 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-09-15 01:16:23,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:23,504 INFO L93 Difference]: Finished difference Result 269 states and 647 transitions. [2020-09-15 01:16:23,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:16:23,508 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:16:23,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:23,509 INFO L225 Difference]: With dead ends: 269 [2020-09-15 01:16:23,509 INFO L226 Difference]: Without dead ends: 267 [2020-09-15 01:16:23,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=599, Invalid=1563, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:16:23,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-09-15 01:16:23,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 166. [2020-09-15 01:16:23,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:16:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-15 01:16:23,513 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-15 01:16:23,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:23,513 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-15 01:16:23,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:16:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-15 01:16:23,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:23,514 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:23,514 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:23,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:23,715 INFO L427 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:23,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:23,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1289294092, now seen corresponding path program 229 times [2020-09-15 01:16:23,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:23,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959647655] [2020-09-15 01:16:23,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:23,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:23,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959647655] [2020-09-15 01:16:23,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264913951] [2020-09-15 01:16:23,994 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:24,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:16:24,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:24,427 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:16:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:24,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:24,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:16:24,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947214090] [2020-09-15 01:16:24,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:16:24,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:24,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:16:24,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:16:24,460 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-15 01:16:27,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:27,598 INFO L93 Difference]: Finished difference Result 280 states and 682 transitions. [2020-09-15 01:16:27,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 01:16:27,601 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:16:27,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:27,601 INFO L225 Difference]: With dead ends: 280 [2020-09-15 01:16:27,602 INFO L226 Difference]: Without dead ends: 272 [2020-09-15 01:16:27,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=744, Invalid=1908, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:16:27,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-09-15 01:16:27,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 166. [2020-09-15 01:16:27,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:16:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-15 01:16:27,605 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-15 01:16:27,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:27,605 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-15 01:16:27,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:16:27,605 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-15 01:16:27,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:27,605 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:27,605 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:27,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:27,809 INFO L427 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:27,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:27,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1289293131, now seen corresponding path program 230 times [2020-09-15 01:16:27,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:27,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652749473] [2020-09-15 01:16:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:28,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:28,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652749473] [2020-09-15 01:16:28,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122195330] [2020-09-15 01:16:28,131 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:28,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:16:28,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:28,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:16:28,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:28,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:16:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:28,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:28,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:16:28,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183599796] [2020-09-15 01:16:28,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:16:28,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:28,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:16:28,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:16:28,677 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-15 01:16:30,576 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-09-15 01:16:32,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:32,274 INFO L93 Difference]: Finished difference Result 284 states and 697 transitions. [2020-09-15 01:16:32,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:16:32,278 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:16:32,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:32,279 INFO L225 Difference]: With dead ends: 284 [2020-09-15 01:16:32,279 INFO L226 Difference]: Without dead ends: 276 [2020-09-15 01:16:32,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:16:32,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-09-15 01:16:32,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 164. [2020-09-15 01:16:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:16:32,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-09-15 01:16:32,283 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-09-15 01:16:32,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:32,284 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-09-15 01:16:32,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:16:32,284 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-09-15 01:16:32,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:32,284 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:32,284 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:32,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:32,487 INFO L427 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:32,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:32,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1289285660, now seen corresponding path program 231 times [2020-09-15 01:16:32,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:32,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434951055] [2020-09-15 01:16:32,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:32,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434951055] [2020-09-15 01:16:32,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406944130] [2020-09-15 01:16:32,807 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:32,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:16:32,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:32,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:16:32,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:33,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:33,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:16:33,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293125883] [2020-09-15 01:16:33,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:16:33,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:33,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:16:33,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:16:33,347 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-09-15 01:16:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:35,746 INFO L93 Difference]: Finished difference Result 261 states and 630 transitions. [2020-09-15 01:16:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:16:35,749 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:16:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:35,750 INFO L225 Difference]: With dead ends: 261 [2020-09-15 01:16:35,750 INFO L226 Difference]: Without dead ends: 259 [2020-09-15 01:16:35,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=478, Invalid=1244, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:16:35,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-15 01:16:35,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 166. [2020-09-15 01:16:35,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:16:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-15 01:16:35,753 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-15 01:16:35,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:35,754 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-15 01:16:35,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:16:35,754 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-15 01:16:35,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:35,754 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:35,754 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:35,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:35,955 INFO L427 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:35,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:35,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1289264301, now seen corresponding path program 232 times [2020-09-15 01:16:35,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:35,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656749088] [2020-09-15 01:16:35,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:36,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656749088] [2020-09-15 01:16:36,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135376677] [2020-09-15 01:16:36,273 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:36,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:16:36,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:36,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:16:36,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:36,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:16:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:36,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:36,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:16:36,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003322279] [2020-09-15 01:16:36,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:16:36,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:36,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:16:36,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:16:36,667 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-15 01:16:39,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:39,444 INFO L93 Difference]: Finished difference Result 278 states and 682 transitions. [2020-09-15 01:16:39,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:16:39,447 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:16:39,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:39,448 INFO L225 Difference]: With dead ends: 278 [2020-09-15 01:16:39,448 INFO L226 Difference]: Without dead ends: 270 [2020-09-15 01:16:39,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=553, Invalid=1427, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:16:39,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-09-15 01:16:39,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 164. [2020-09-15 01:16:39,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:16:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 414 transitions. [2020-09-15 01:16:39,451 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 414 transitions. Word has length 14 [2020-09-15 01:16:39,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:39,451 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 414 transitions. [2020-09-15 01:16:39,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:16:39,451 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 414 transitions. [2020-09-15 01:16:39,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:39,452 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:39,452 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:39,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:39,653 INFO L427 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:39,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:39,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1289263340, now seen corresponding path program 233 times [2020-09-15 01:16:39,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:39,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918401370] [2020-09-15 01:16:39,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:39,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918401370] [2020-09-15 01:16:39,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099901897] [2020-09-15 01:16:39,982 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:40,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:16:40,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:40,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:16:40,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:40,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:16:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:40,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:40,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:16:40,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995366617] [2020-09-15 01:16:40,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:16:40,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:40,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:16:40,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:16:40,457 INFO L87 Difference]: Start difference. First operand 164 states and 414 transitions. Second operand 17 states. [2020-09-15 01:16:43,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:43,767 INFO L93 Difference]: Finished difference Result 294 states and 716 transitions. [2020-09-15 01:16:43,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:16:43,770 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:16:43,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:43,771 INFO L225 Difference]: With dead ends: 294 [2020-09-15 01:16:43,771 INFO L226 Difference]: Without dead ends: 286 [2020-09-15 01:16:43,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=634, Invalid=1718, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:16:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-09-15 01:16:43,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 157. [2020-09-15 01:16:43,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-15 01:16:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 391 transitions. [2020-09-15 01:16:43,774 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 391 transitions. Word has length 14 [2020-09-15 01:16:43,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:43,774 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 391 transitions. [2020-09-15 01:16:43,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:16:43,774 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 391 transitions. [2020-09-15 01:16:43,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:43,775 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:43,775 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:43,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2020-09-15 01:16:43,976 INFO L427 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:43,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:43,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1288370571, now seen corresponding path program 234 times [2020-09-15 01:16:43,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:43,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914031535] [2020-09-15 01:16:43,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:44,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914031535] [2020-09-15 01:16:44,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433349230] [2020-09-15 01:16:44,289 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:44,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:16:44,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:44,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:16:44,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:44,794 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:16:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:44,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:44,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:16:44,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708460317] [2020-09-15 01:16:44,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:16:44,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:44,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:16:44,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:16:44,835 INFO L87 Difference]: Start difference. First operand 157 states and 391 transitions. Second operand 17 states. [2020-09-15 01:16:48,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:48,187 INFO L93 Difference]: Finished difference Result 270 states and 648 transitions. [2020-09-15 01:16:48,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:16:48,190 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:16:48,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:48,191 INFO L225 Difference]: With dead ends: 270 [2020-09-15 01:16:48,191 INFO L226 Difference]: Without dead ends: 262 [2020-09-15 01:16:48,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=648, Invalid=1704, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:16:48,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-15 01:16:48,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 155. [2020-09-15 01:16:48,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-15 01:16:48,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 381 transitions. [2020-09-15 01:16:48,194 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 381 transitions. Word has length 14 [2020-09-15 01:16:48,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:48,195 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 381 transitions. [2020-09-15 01:16:48,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:16:48,195 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 381 transitions. [2020-09-15 01:16:48,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:48,195 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:48,195 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:48,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:48,396 INFO L427 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:48,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:48,397 INFO L82 PathProgramCache]: Analyzing trace with hash -423000859, now seen corresponding path program 235 times [2020-09-15 01:16:48,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:48,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317884167] [2020-09-15 01:16:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:48,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317884167] [2020-09-15 01:16:48,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130473725] [2020-09-15 01:16:48,674 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:48,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:16:48,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:49,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:49,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:16:49,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692592945] [2020-09-15 01:16:49,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:16:49,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:49,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:16:49,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:16:49,219 INFO L87 Difference]: Start difference. First operand 155 states and 381 transitions. Second operand 17 states. [2020-09-15 01:16:50,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:50,692 INFO L93 Difference]: Finished difference Result 235 states and 538 transitions. [2020-09-15 01:16:50,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:16:50,697 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:16:50,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:50,697 INFO L225 Difference]: With dead ends: 235 [2020-09-15 01:16:50,697 INFO L226 Difference]: Without dead ends: 233 [2020-09-15 01:16:50,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:16:50,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-15 01:16:50,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 153. [2020-09-15 01:16:50,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-15 01:16:50,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 376 transitions. [2020-09-15 01:16:50,705 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 376 transitions. Word has length 14 [2020-09-15 01:16:50,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:50,705 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 376 transitions. [2020-09-15 01:16:50,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:16:50,706 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 376 transitions. [2020-09-15 01:16:50,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:50,706 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:50,706 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:50,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2020-09-15 01:16:50,907 INFO L427 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:50,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:50,908 INFO L82 PathProgramCache]: Analyzing trace with hash -401551339, now seen corresponding path program 236 times [2020-09-15 01:16:50,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:50,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41122109] [2020-09-15 01:16:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:51,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:51,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41122109] [2020-09-15 01:16:51,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654543774] [2020-09-15 01:16:51,225 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:51,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:16:51,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:51,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:16:51,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:51,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:51,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:16:51,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812469684] [2020-09-15 01:16:51,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:16:51,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:51,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:16:51,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:16:51,825 INFO L87 Difference]: Start difference. First operand 153 states and 376 transitions. Second operand 17 states. [2020-09-15 01:16:53,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:53,289 INFO L93 Difference]: Finished difference Result 227 states and 520 transitions. [2020-09-15 01:16:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:16:53,293 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:16:53,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:53,293 INFO L225 Difference]: With dead ends: 227 [2020-09-15 01:16:53,293 INFO L226 Difference]: Without dead ends: 225 [2020-09-15 01:16:53,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=264, Invalid=666, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:16:53,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-15 01:16:53,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 151. [2020-09-15 01:16:53,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-15 01:16:53,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 371 transitions. [2020-09-15 01:16:53,297 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 371 transitions. Word has length 14 [2020-09-15 01:16:53,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:53,297 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 371 transitions. [2020-09-15 01:16:53,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:16:53,297 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 371 transitions. [2020-09-15 01:16:53,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:53,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:53,298 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:53,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-09-15 01:16:53,499 INFO L427 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:53,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:53,499 INFO L82 PathProgramCache]: Analyzing trace with hash -400888249, now seen corresponding path program 237 times [2020-09-15 01:16:53,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:53,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299500029] [2020-09-15 01:16:53,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:53,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299500029] [2020-09-15 01:16:53,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523683760] [2020-09-15 01:16:53,784 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:53,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:16:53,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:53,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:16:53,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:54,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:54,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:16:54,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029635921] [2020-09-15 01:16:54,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:16:54,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:54,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:16:54,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:16:54,316 INFO L87 Difference]: Start difference. First operand 151 states and 371 transitions. Second operand 17 states. [2020-09-15 01:16:56,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:56,324 INFO L93 Difference]: Finished difference Result 235 states and 542 transitions. [2020-09-15 01:16:56,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:16:56,327 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:16:56,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:56,328 INFO L225 Difference]: With dead ends: 235 [2020-09-15 01:16:56,328 INFO L226 Difference]: Without dead ends: 233 [2020-09-15 01:16:56,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:16:56,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-15 01:16:56,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 152. [2020-09-15 01:16:56,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-15 01:16:56,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 373 transitions. [2020-09-15 01:16:56,331 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 373 transitions. Word has length 14 [2020-09-15 01:16:56,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:56,331 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 373 transitions. [2020-09-15 01:16:56,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:16:56,331 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 373 transitions. [2020-09-15 01:16:56,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:56,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:56,332 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:56,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:56,532 INFO L427 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:56,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:56,533 INFO L82 PathProgramCache]: Analyzing trace with hash -400865929, now seen corresponding path program 238 times [2020-09-15 01:16:56,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:56,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417724555] [2020-09-15 01:16:56,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:56,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417724555] [2020-09-15 01:16:56,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112501326] [2020-09-15 01:16:56,843 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:56,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:16:56,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:56,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:16:56,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:57,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:17:01,517 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 21 [2020-09-15 01:17:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:01,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:01,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-15 01:17:01,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566975822] [2020-09-15 01:17:01,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:17:01,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:01,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:17:01,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2020-09-15 01:17:01,520 INFO L87 Difference]: Start difference. First operand 152 states and 373 transitions. Second operand 18 states. [2020-09-15 01:17:02,230 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 22 [2020-09-15 01:17:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:51,518 INFO L93 Difference]: Finished difference Result 274 states and 638 transitions. [2020-09-15 01:17:51,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:17:51,522 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-09-15 01:17:51,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:51,523 INFO L225 Difference]: With dead ends: 274 [2020-09-15 01:17:51,523 INFO L226 Difference]: Without dead ends: 269 [2020-09-15 01:17:51,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=522, Invalid=1280, Unknown=4, NotChecked=0, Total=1806 [2020-09-15 01:17:51,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-15 01:17:51,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 150. [2020-09-15 01:17:51,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-15 01:17:51,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 366 transitions. [2020-09-15 01:17:51,527 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 366 transitions. Word has length 14 [2020-09-15 01:17:51,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:51,527 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 366 transitions. [2020-09-15 01:17:51,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:17:51,527 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 366 transitions. [2020-09-15 01:17:51,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:17:51,528 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:51,528 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:51,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2020-09-15 01:17:51,729 INFO L427 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:51,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:51,729 INFO L82 PathProgramCache]: Analyzing trace with hash -400837099, now seen corresponding path program 239 times [2020-09-15 01:17:51,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:51,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484678900] [2020-09-15 01:17:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:52,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484678900] [2020-09-15 01:17:52,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117272865] [2020-09-15 01:17:52,044 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:52,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:17:52,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:52,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:17:52,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:52,527 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:17:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:52,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:52,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:17:52,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578614127] [2020-09-15 01:17:52,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:17:52,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:52,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:17:52,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:17:52,568 INFO L87 Difference]: Start difference. First operand 150 states and 366 transitions. Second operand 17 states. [2020-09-15 01:17:55,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:55,144 INFO L93 Difference]: Finished difference Result 241 states and 562 transitions. [2020-09-15 01:17:55,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:17:55,147 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:17:55,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:55,148 INFO L225 Difference]: With dead ends: 241 [2020-09-15 01:17:55,148 INFO L226 Difference]: Without dead ends: 236 [2020-09-15 01:17:55,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=426, Invalid=1056, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:17:55,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-09-15 01:17:55,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 146. [2020-09-15 01:17:55,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-15 01:17:55,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 342 transitions. [2020-09-15 01:17:55,152 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 342 transitions. Word has length 14 [2020-09-15 01:17:55,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:55,153 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 342 transitions. [2020-09-15 01:17:55,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:17:55,153 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 342 transitions. [2020-09-15 01:17:55,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:17:55,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:55,153 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:55,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:55,354 INFO L427 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:55,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:55,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1019616642, now seen corresponding path program 7 times [2020-09-15 01:17:55,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:55,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809899704] [2020-09-15 01:17:55,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:55,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809899704] [2020-09-15 01:17:55,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740405622] [2020-09-15 01:17:55,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:55,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:17:55,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:56,303 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:17:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:56,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:56,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 01:17:56,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108730739] [2020-09-15 01:17:56,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:17:56,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:56,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:17:56,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:17:56,413 INFO L87 Difference]: Start difference. First operand 146 states and 342 transitions. Second operand 20 states. [2020-09-15 01:17:57,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:57,194 INFO L93 Difference]: Finished difference Result 206 states and 480 transitions. [2020-09-15 01:17:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:17:57,199 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 14 [2020-09-15 01:17:57,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:57,199 INFO L225 Difference]: With dead ends: 206 [2020-09-15 01:17:57,200 INFO L226 Difference]: Without dead ends: 201 [2020-09-15 01:17:57,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:17:57,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-15 01:17:57,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2020-09-15 01:17:57,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-15 01:17:57,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 383 transitions. [2020-09-15 01:17:57,203 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 383 transitions. Word has length 14 [2020-09-15 01:17:57,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:57,203 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 383 transitions. [2020-09-15 01:17:57,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:17:57,204 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 383 transitions. [2020-09-15 01:17:57,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:17:57,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:57,204 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:57,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:57,405 INFO L427 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:57,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:57,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1046764459, now seen corresponding path program 28 times [2020-09-15 01:17:57,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:57,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926417626] [2020-09-15 01:17:57,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:57,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926417626] [2020-09-15 01:17:57,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902158411] [2020-09-15 01:17:57,812 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:57,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:17:57,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:57,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:17:57,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:58,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:58,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:17:58,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899725335] [2020-09-15 01:17:58,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:17:58,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:58,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:17:58,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:17:58,492 INFO L87 Difference]: Start difference. First operand 156 states and 383 transitions. Second operand 19 states. [2020-09-15 01:17:59,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:59,325 INFO L93 Difference]: Finished difference Result 208 states and 487 transitions. [2020-09-15 01:17:59,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:17:59,330 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-15 01:17:59,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:59,330 INFO L225 Difference]: With dead ends: 208 [2020-09-15 01:17:59,330 INFO L226 Difference]: Without dead ends: 205 [2020-09-15 01:17:59,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:17:59,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-09-15 01:17:59,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 167. [2020-09-15 01:17:59,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:17:59,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 409 transitions. [2020-09-15 01:17:59,334 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 409 transitions. Word has length 14 [2020-09-15 01:17:59,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:59,334 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 409 transitions. [2020-09-15 01:17:59,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:17:59,334 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 409 transitions. [2020-09-15 01:17:59,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:17:59,335 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:59,335 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:59,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:59,536 INFO L427 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:59,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:59,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1739755227, now seen corresponding path program 29 times [2020-09-15 01:17:59,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:59,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737166132] [2020-09-15 01:17:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:59,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737166132] [2020-09-15 01:17:59,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342183028] [2020-09-15 01:17:59,909 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:59,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:17:59,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:59,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:17:59,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:00,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:00,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:00,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703596803] [2020-09-15 01:18:00,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:00,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:00,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:00,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:00,674 INFO L87 Difference]: Start difference. First operand 167 states and 409 transitions. Second operand 19 states. [2020-09-15 01:18:01,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:01,816 INFO L93 Difference]: Finished difference Result 228 states and 526 transitions. [2020-09-15 01:18:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:18:01,819 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-15 01:18:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:01,820 INFO L225 Difference]: With dead ends: 228 [2020-09-15 01:18:01,820 INFO L226 Difference]: Without dead ends: 225 [2020-09-15 01:18:01,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:18:01,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-15 01:18:01,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 167. [2020-09-15 01:18:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:18:01,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 409 transitions. [2020-09-15 01:18:01,823 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 409 transitions. Word has length 14 [2020-09-15 01:18:01,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:01,823 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 409 transitions. [2020-09-15 01:18:01,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:01,823 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 409 transitions. [2020-09-15 01:18:01,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:01,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:01,824 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:02,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:02,025 INFO L427 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:02,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:02,025 INFO L82 PathProgramCache]: Analyzing trace with hash 792278443, now seen corresponding path program 30 times [2020-09-15 01:18:02,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:02,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661289327] [2020-09-15 01:18:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:02,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661289327] [2020-09-15 01:18:02,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357135810] [2020-09-15 01:18:02,400 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:02,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:18:02,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:02,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:02,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:03,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:03,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:03,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127793488] [2020-09-15 01:18:03,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:03,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:03,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:03,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:03,209 INFO L87 Difference]: Start difference. First operand 167 states and 409 transitions. Second operand 19 states. [2020-09-15 01:18:04,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:04,856 INFO L93 Difference]: Finished difference Result 239 states and 550 transitions. [2020-09-15 01:18:04,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:18:04,861 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-15 01:18:04,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:04,862 INFO L225 Difference]: With dead ends: 239 [2020-09-15 01:18:04,862 INFO L226 Difference]: Without dead ends: 236 [2020-09-15 01:18:04,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=292, Invalid=830, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:18:04,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-09-15 01:18:04,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 168. [2020-09-15 01:18:04,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-15 01:18:04,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 414 transitions. [2020-09-15 01:18:04,865 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 414 transitions. Word has length 14 [2020-09-15 01:18:04,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:04,867 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 414 transitions. [2020-09-15 01:18:04,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:04,867 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 414 transitions. [2020-09-15 01:18:04,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:04,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:04,869 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:05,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2020-09-15 01:18:05,078 INFO L427 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:05,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:05,079 INFO L82 PathProgramCache]: Analyzing trace with hash -69569317, now seen corresponding path program 31 times [2020-09-15 01:18:05,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:05,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869442024] [2020-09-15 01:18:05,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:05,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869442024] [2020-09-15 01:18:05,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321126969] [2020-09-15 01:18:05,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:05,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:05,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:06,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:06,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:06,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157735470] [2020-09-15 01:18:06,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:06,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:06,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:06,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:06,074 INFO L87 Difference]: Start difference. First operand 168 states and 414 transitions. Second operand 19 states. [2020-09-15 01:18:07,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:07,936 INFO L93 Difference]: Finished difference Result 244 states and 562 transitions. [2020-09-15 01:18:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:18:07,941 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-15 01:18:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:07,942 INFO L225 Difference]: With dead ends: 244 [2020-09-15 01:18:07,942 INFO L226 Difference]: Without dead ends: 241 [2020-09-15 01:18:07,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:18:07,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-15 01:18:07,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 169. [2020-09-15 01:18:07,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:18:07,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 419 transitions. [2020-09-15 01:18:07,945 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 419 transitions. Word has length 14 [2020-09-15 01:18:07,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:07,945 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 419 transitions. [2020-09-15 01:18:07,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:07,946 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 419 transitions. [2020-09-15 01:18:07,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:07,946 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:07,946 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:08,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:08,147 INFO L427 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:08,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:08,147 INFO L82 PathProgramCache]: Analyzing trace with hash 595365803, now seen corresponding path program 32 times [2020-09-15 01:18:08,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:08,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750504320] [2020-09-15 01:18:08,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:08,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750504320] [2020-09-15 01:18:08,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412333670] [2020-09-15 01:18:08,502 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:08,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:08,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:08,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:08,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:09,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:09,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:09,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007324666] [2020-09-15 01:18:09,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:09,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:09,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:09,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:09,212 INFO L87 Difference]: Start difference. First operand 169 states and 419 transitions. Second operand 19 states. [2020-09-15 01:18:11,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:11,122 INFO L93 Difference]: Finished difference Result 243 states and 562 transitions. [2020-09-15 01:18:11,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:18:11,127 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-15 01:18:11,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:11,128 INFO L225 Difference]: With dead ends: 243 [2020-09-15 01:18:11,128 INFO L226 Difference]: Without dead ends: 240 [2020-09-15 01:18:11,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=387, Invalid=1019, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:18:11,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-09-15 01:18:11,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 170. [2020-09-15 01:18:11,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-15 01:18:11,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 424 transitions. [2020-09-15 01:18:11,131 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 424 transitions. Word has length 14 [2020-09-15 01:18:11,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:11,132 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 424 transitions. [2020-09-15 01:18:11,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:11,132 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 424 transitions. [2020-09-15 01:18:11,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:11,132 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:11,132 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:11,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2020-09-15 01:18:11,333 INFO L427 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:11,334 INFO L82 PathProgramCache]: Analyzing trace with hash 616815323, now seen corresponding path program 33 times [2020-09-15 01:18:11,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:11,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35634844] [2020-09-15 01:18:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:11,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35634844] [2020-09-15 01:18:11,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486600413] [2020-09-15 01:18:11,689 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:11,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 01:18:11,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:11,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:11,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:12,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:12,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:12,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050941125] [2020-09-15 01:18:12,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:12,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:12,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:12,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:12,350 INFO L87 Difference]: Start difference. First operand 170 states and 424 transitions. Second operand 19 states. [2020-09-15 01:18:14,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:14,026 INFO L93 Difference]: Finished difference Result 238 states and 554 transitions. [2020-09-15 01:18:14,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:18:14,030 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-15 01:18:14,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:14,031 INFO L225 Difference]: With dead ends: 238 [2020-09-15 01:18:14,031 INFO L226 Difference]: Without dead ends: 235 [2020-09-15 01:18:14,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=357, Invalid=903, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:18:14,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-15 01:18:14,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 172. [2020-09-15 01:18:14,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-15 01:18:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 431 transitions. [2020-09-15 01:18:14,035 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 431 transitions. Word has length 14 [2020-09-15 01:18:14,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:14,035 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 431 transitions. [2020-09-15 01:18:14,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:14,035 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 431 transitions. [2020-09-15 01:18:14,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:14,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:14,036 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:14,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-09-15 01:18:14,237 INFO L427 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:14,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:14,237 INFO L82 PathProgramCache]: Analyzing trace with hash 617507243, now seen corresponding path program 34 times [2020-09-15 01:18:14,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:14,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213218800] [2020-09-15 01:18:14,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:14,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213218800] [2020-09-15 01:18:14,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882905424] [2020-09-15 01:18:14,598 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:14,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:14,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:14,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:14,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:15,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:15,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:15,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057289041] [2020-09-15 01:18:15,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:15,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:15,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:15,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:15,227 INFO L87 Difference]: Start difference. First operand 172 states and 431 transitions. Second operand 19 states. [2020-09-15 01:18:16,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:16,597 INFO L93 Difference]: Finished difference Result 223 states and 526 transitions. [2020-09-15 01:18:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:18:16,599 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-15 01:18:16,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:16,600 INFO L225 Difference]: With dead ends: 223 [2020-09-15 01:18:16,600 INFO L226 Difference]: Without dead ends: 220 [2020-09-15 01:18:16,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:18:16,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-15 01:18:16,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 174. [2020-09-15 01:18:16,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-15 01:18:16,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 438 transitions. [2020-09-15 01:18:16,604 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 438 transitions. Word has length 14 [2020-09-15 01:18:16,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:16,604 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 438 transitions. [2020-09-15 01:18:16,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:16,608 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 438 transitions. [2020-09-15 01:18:16,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:16,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:16,608 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:16,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:16,809 INFO L427 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:16,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:16,809 INFO L82 PathProgramCache]: Analyzing trace with hash 617529563, now seen corresponding path program 35 times [2020-09-15 01:18:16,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:16,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544812047] [2020-09-15 01:18:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:17,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544812047] [2020-09-15 01:18:17,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134345880] [2020-09-15 01:18:17,186 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:17,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:18:17,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:17,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:17,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:17,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:17,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:17,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:17,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134808577] [2020-09-15 01:18:17,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:17,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:17,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:17,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:17,742 INFO L87 Difference]: Start difference. First operand 174 states and 438 transitions. Second operand 19 states. [2020-09-15 01:18:19,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:19,306 INFO L93 Difference]: Finished difference Result 228 states and 542 transitions. [2020-09-15 01:18:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:18:19,310 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-15 01:18:19,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:19,311 INFO L225 Difference]: With dead ends: 228 [2020-09-15 01:18:19,311 INFO L226 Difference]: Without dead ends: 222 [2020-09-15 01:18:19,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=335, Invalid=787, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:18:19,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-15 01:18:19,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 170. [2020-09-15 01:18:19,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-15 01:18:19,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 432 transitions. [2020-09-15 01:18:19,315 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 432 transitions. Word has length 14 [2020-09-15 01:18:19,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:19,315 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 432 transitions. [2020-09-15 01:18:19,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 432 transitions. [2020-09-15 01:18:19,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:19,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:19,315 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:19,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2020-09-15 01:18:19,516 INFO L427 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:19,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:19,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1771658259, now seen corresponding path program 240 times [2020-09-15 01:18:19,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:19,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635512248] [2020-09-15 01:18:19,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:19,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635512248] [2020-09-15 01:18:19,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519814864] [2020-09-15 01:18:19,871 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:19,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:18:19,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:19,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:19,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:20,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:20,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:20,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915124854] [2020-09-15 01:18:20,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:20,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:20,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:20,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:20,700 INFO L87 Difference]: Start difference. First operand 170 states and 432 transitions. Second operand 19 states. [2020-09-15 01:18:20,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:20,892 INFO L93 Difference]: Finished difference Result 213 states and 518 transitions. [2020-09-15 01:18:20,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:18:20,898 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:18:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:20,898 INFO L225 Difference]: With dead ends: 213 [2020-09-15 01:18:20,898 INFO L226 Difference]: Without dead ends: 211 [2020-09-15 01:18:20,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:20,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-15 01:18:20,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 180. [2020-09-15 01:18:20,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-09-15 01:18:20,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 462 transitions. [2020-09-15 01:18:20,904 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 462 transitions. Word has length 15 [2020-09-15 01:18:20,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:20,904 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 462 transitions. [2020-09-15 01:18:20,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:20,904 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 462 transitions. [2020-09-15 01:18:20,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:20,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:20,905 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:21,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:21,116 INFO L427 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:21,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:21,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1771657298, now seen corresponding path program 241 times [2020-09-15 01:18:21,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:21,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424142531] [2020-09-15 01:18:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:21,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424142531] [2020-09-15 01:18:21,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901705267] [2020-09-15 01:18:21,522 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:21,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:21,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:21,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:22,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:22,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:22,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691097688] [2020-09-15 01:18:22,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:22,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:22,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:22,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:22,213 INFO L87 Difference]: Start difference. First operand 180 states and 462 transitions. Second operand 19 states. [2020-09-15 01:18:22,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:22,556 INFO L93 Difference]: Finished difference Result 226 states and 544 transitions. [2020-09-15 01:18:22,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:18:22,560 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:18:22,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:22,561 INFO L225 Difference]: With dead ends: 226 [2020-09-15 01:18:22,561 INFO L226 Difference]: Without dead ends: 224 [2020-09-15 01:18:22,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:18:22,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-15 01:18:22,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 178. [2020-09-15 01:18:22,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-09-15 01:18:22,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 456 transitions. [2020-09-15 01:18:22,565 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 456 transitions. Word has length 15 [2020-09-15 01:18:22,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:22,565 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 456 transitions. [2020-09-15 01:18:22,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:22,565 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 456 transitions. [2020-09-15 01:18:22,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:22,566 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:22,566 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:22,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:22,767 INFO L427 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:22,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:22,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1771628468, now seen corresponding path program 242 times [2020-09-15 01:18:22,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:22,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952026593] [2020-09-15 01:18:22,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:23,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952026593] [2020-09-15 01:18:23,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004116007] [2020-09-15 01:18:23,205 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:23,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:23,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:23,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:23,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:24,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:24,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:24,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899219071] [2020-09-15 01:18:24,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:24,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:24,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:24,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:24,092 INFO L87 Difference]: Start difference. First operand 178 states and 456 transitions. Second operand 19 states. [2020-09-15 01:18:24,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:24,802 INFO L93 Difference]: Finished difference Result 241 states and 574 transitions. [2020-09-15 01:18:24,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:18:24,806 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:18:24,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:24,807 INFO L225 Difference]: With dead ends: 241 [2020-09-15 01:18:24,807 INFO L226 Difference]: Without dead ends: 239 [2020-09-15 01:18:24,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:18:24,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-15 01:18:24,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 176. [2020-09-15 01:18:24,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-15 01:18:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-15 01:18:24,811 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-15 01:18:24,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:24,811 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-15 01:18:24,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:24,811 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-15 01:18:24,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:24,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:24,812 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:25,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:25,013 INFO L427 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:25,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:25,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1770734738, now seen corresponding path program 243 times [2020-09-15 01:18:25,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:25,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614498801] [2020-09-15 01:18:25,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:25,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614498801] [2020-09-15 01:18:25,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972862655] [2020-09-15 01:18:25,411 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:25,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:18:25,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:25,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:25,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:26,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:26,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:26,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886799434] [2020-09-15 01:18:26,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:26,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:26,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:26,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:26,303 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states. [2020-09-15 01:18:27,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:27,389 INFO L93 Difference]: Finished difference Result 243 states and 578 transitions. [2020-09-15 01:18:27,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:18:27,393 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:18:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:27,394 INFO L225 Difference]: With dead ends: 243 [2020-09-15 01:18:27,394 INFO L226 Difference]: Without dead ends: 241 [2020-09-15 01:18:27,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:18:27,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-15 01:18:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 178. [2020-09-15 01:18:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-09-15 01:18:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 456 transitions. [2020-09-15 01:18:27,398 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 456 transitions. Word has length 15 [2020-09-15 01:18:27,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:27,399 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 456 transitions. [2020-09-15 01:18:27,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:27,399 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 456 transitions. [2020-09-15 01:18:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:27,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:27,400 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:27,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:27,611 INFO L427 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:27,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:27,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1770733777, now seen corresponding path program 244 times [2020-09-15 01:18:27,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:27,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830421935] [2020-09-15 01:18:27,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:28,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830421935] [2020-09-15 01:18:28,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336455524] [2020-09-15 01:18:28,050 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:28,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:28,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:28,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:28,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:31,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:31,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:31,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152911398] [2020-09-15 01:18:31,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:31,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:31,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:31,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=238, Unknown=1, NotChecked=0, Total=342 [2020-09-15 01:18:31,051 INFO L87 Difference]: Start difference. First operand 178 states and 456 transitions. Second operand 19 states. [2020-09-15 01:18:31,457 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 18 [2020-09-15 01:18:34,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:34,179 INFO L93 Difference]: Finished difference Result 253 states and 599 transitions. [2020-09-15 01:18:34,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:18:34,184 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:18:34,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:34,185 INFO L225 Difference]: With dead ends: 253 [2020-09-15 01:18:34,185 INFO L226 Difference]: Without dead ends: 251 [2020-09-15 01:18:34,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=170, Invalid=380, Unknown=2, NotChecked=0, Total=552 [2020-09-15 01:18:34,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-15 01:18:34,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 177. [2020-09-15 01:18:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-15 01:18:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-15 01:18:34,188 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-15 01:18:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:34,188 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-15 01:18:34,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:34,188 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-15 01:18:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:34,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:34,189 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:34,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:34,390 INFO L427 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:34,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:34,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1770704947, now seen corresponding path program 245 times [2020-09-15 01:18:34,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:34,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191482782] [2020-09-15 01:18:34,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:34,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191482782] [2020-09-15 01:18:34,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023154342] [2020-09-15 01:18:34,761 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:34,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:18:34,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:34,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:34,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:35,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:35,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:35,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346797423] [2020-09-15 01:18:35,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:35,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:35,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:35,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:35,876 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-15 01:18:37,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:37,073 INFO L93 Difference]: Finished difference Result 247 states and 589 transitions. [2020-09-15 01:18:37,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:18:37,077 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:18:37,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:37,078 INFO L225 Difference]: With dead ends: 247 [2020-09-15 01:18:37,078 INFO L226 Difference]: Without dead ends: 245 [2020-09-15 01:18:37,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:18:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-09-15 01:18:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 174. [2020-09-15 01:18:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-15 01:18:37,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 444 transitions. [2020-09-15 01:18:37,082 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 444 transitions. Word has length 15 [2020-09-15 01:18:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:37,082 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 444 transitions. [2020-09-15 01:18:37,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:37,082 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 444 transitions. [2020-09-15 01:18:37,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:37,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:37,082 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:37,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-09-15 01:18:37,283 INFO L427 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:37,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:37,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1743029108, now seen corresponding path program 246 times [2020-09-15 01:18:37,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:37,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47888912] [2020-09-15 01:18:37,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:37,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47888912] [2020-09-15 01:18:37,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698771299] [2020-09-15 01:18:37,726 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:37,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:18:37,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:37,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:37,784 INFO L286 TraceCheckSpWp]: Computing forward predicates...