/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 12:44:18,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 12:44:18,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 12:44:18,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 12:44:18,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 12:44:18,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 12:44:18,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 12:44:18,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 12:44:18,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 12:44:18,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 12:44:18,977 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 12:44:18,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 12:44:18,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 12:44:18,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 12:44:18,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 12:44:18,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 12:44:18,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 12:44:18,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 12:44:18,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 12:44:18,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 12:44:18,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 12:44:18,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 12:44:18,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 12:44:18,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 12:44:18,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-11 12:44:18,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-11 12:44:18,994 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-11 12:44:18,995 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-11 12:44:18,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-11 12:44:18,996 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-11 12:44:18,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 12:44:18,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 12:44:18,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 12:44:18,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 12:44:19,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 12:44:19,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 12:44:19,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 12:44:19,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 12:44:19,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 12:44:19,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 12:44:19,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 12:44:19,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-11 12:44:19,042 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 12:44:19,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 12:44:19,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 12:44:19,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 12:44:19,047 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 12:44:19,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 12:44:19,048 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 12:44:19,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 12:44:19,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 12:44:19,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 12:44:19,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 12:44:19,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 12:44:19,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 12:44:19,049 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 12:44:19,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 12:44:19,049 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 12:44:19,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 12:44:19,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 12:44:19,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 12:44:19,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 12:44:19,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 12:44:19,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 12:44:19,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 12:44:19,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 12:44:19,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 12:44:19,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 12:44:19,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 12:44:19,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-11 12:44:19,056 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-11 12:44:19,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 12:44:19,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 12:44:19,413 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 12:44:19,418 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 12:44:19,419 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 12:44:19,419 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 12:44:19,420 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2020-10-11 12:44:19,476 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1172f552/36056a3a8da74d55b0e22462a627d946/FLAG7545b144b [2020-10-11 12:44:19,961 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 12:44:19,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2020-10-11 12:44:19,980 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1172f552/36056a3a8da74d55b0e22462a627d946/FLAG7545b144b [2020-10-11 12:44:20,317 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1172f552/36056a3a8da74d55b0e22462a627d946 [2020-10-11 12:44:20,326 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 12:44:20,331 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 12:44:20,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 12:44:20,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 12:44:20,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 12:44:20,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:44:20" (1/1) ... [2020-10-11 12:44:20,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d9e1062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:20, skipping insertion in model container [2020-10-11 12:44:20,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:44:20" (1/1) ... [2020-10-11 12:44:20,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 12:44:20,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 12:44:20,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 12:44:20,923 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 12:44:20,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 12:44:21,039 INFO L208 MainTranslator]: Completed translation [2020-10-11 12:44:21,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21 WrapperNode [2020-10-11 12:44:21,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 12:44:21,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 12:44:21,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 12:44:21,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 12:44:21,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 12:44:21,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 12:44:21,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 12:44:21,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 12:44:21,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 12:44:21,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 12:44:21,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 12:44:21,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 12:44:21,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 12:44:21,197 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-11 12:44:21,197 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-11 12:44:21,197 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-11 12:44:21,197 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-11 12:44:21,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 12:44:21,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-11 12:44:21,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 12:44:21,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 12:44:21,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-11 12:44:21,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 12:44:21,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 12:44:21,200 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 12:44:21,586 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 12:44:21,587 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-11 12:44:21,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:44:21 BoogieIcfgContainer [2020-10-11 12:44:21,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 12:44:21,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 12:44:21,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 12:44:21,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 12:44:21,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:44:20" (1/3) ... [2020-10-11 12:44:21,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54830815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:44:21, skipping insertion in model container [2020-10-11 12:44:21,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (2/3) ... [2020-10-11 12:44:21,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54830815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:44:21, skipping insertion in model container [2020-10-11 12:44:21,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:44:21" (3/3) ... [2020-10-11 12:44:21,600 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2020-10-11 12:44:21,614 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-11 12:44:21,614 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 12:44:21,622 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 12:44:21,623 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 12:44:21,652 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,652 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,652 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,653 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,654 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,654 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,654 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,655 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,655 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,655 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,655 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,656 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,656 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,656 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,656 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,657 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,657 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,657 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,658 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,658 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,658 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,659 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,659 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,660 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,660 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,660 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,660 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,661 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,661 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,661 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,668 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,668 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,668 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,668 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,669 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,669 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,691 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,691 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,692 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,692 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,692 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,692 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,729 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-11 12:44:21,754 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 12:44:21,754 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-11 12:44:21,754 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 12:44:21,755 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 12:44:21,755 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 12:44:21,755 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 12:44:21,755 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 12:44:21,755 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 12:44:21,768 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-11 12:44:21,771 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-11 12:44:21,773 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-11 12:44:21,776 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-11 12:44:21,812 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-11 12:44:21,812 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 12:44:21,822 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-11 12:44:21,824 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-11 12:44:22,817 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-11 12:44:22,909 INFO L132 LiptonReduction]: Checked pairs total: 943 [2020-10-11 12:44:22,910 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-11 12:44:22,916 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-11 12:44:22,934 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-11 12:44:22,940 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-11 12:44:22,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-11 12:44:22,954 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:22,955 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-11 12:44:22,955 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:22,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:22,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-10-11 12:44:22,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:22,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585694490] [2020-10-11 12:44:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:23,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585694490] [2020-10-11 12:44:23,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:23,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 12:44:23,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788330335] [2020-10-11 12:44:23,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 12:44:23,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:23,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 12:44:23,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-11 12:44:23,227 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-11 12:44:23,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:23,289 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-11 12:44:23,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-11 12:44:23,291 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-11 12:44:23,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:23,302 INFO L225 Difference]: With dead ends: 83 [2020-10-11 12:44:23,303 INFO L226 Difference]: Without dead ends: 54 [2020-10-11 12:44:23,304 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 12:44:23,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-11 12:44:23,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-11 12:44:23,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 12:44:23,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-11 12:44:23,345 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-11 12:44:23,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:23,346 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-11 12:44:23,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 12:44:23,346 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-11 12:44:23,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-11 12:44:23,347 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:23,347 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:23,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 12:44:23,348 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:23,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:23,348 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-10-11 12:44:23,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:23,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30834924] [2020-10-11 12:44:23,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:23,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30834924] [2020-10-11 12:44:23,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:23,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 12:44:23,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618459184] [2020-10-11 12:44:23,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 12:44:23,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:23,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 12:44:23,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-11 12:44:23,445 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-11 12:44:23,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:23,494 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-11 12:44:23,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 12:44:23,495 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-11 12:44:23,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:23,497 INFO L225 Difference]: With dead ends: 80 [2020-10-11 12:44:23,497 INFO L226 Difference]: Without dead ends: 75 [2020-10-11 12:44:23,498 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-11 12:44:23,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-11 12:44:23,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-11 12:44:23,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-11 12:44:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-11 12:44:23,508 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-11 12:44:23,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:23,509 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-11 12:44:23,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 12:44:23,509 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-11 12:44:23,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-11 12:44:23,510 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:23,510 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:23,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 12:44:23,511 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:23,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:23,511 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-10-11 12:44:23,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:23,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155571782] [2020-10-11 12:44:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:23,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155571782] [2020-10-11 12:44:23,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:23,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 12:44:23,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551858846] [2020-10-11 12:44:23,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 12:44:23,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:23,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 12:44:23,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 12:44:23,587 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-11 12:44:23,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:23,613 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-11 12:44:23,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-11 12:44:23,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-11 12:44:23,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:23,615 INFO L225 Difference]: With dead ends: 73 [2020-10-11 12:44:23,615 INFO L226 Difference]: Without dead ends: 70 [2020-10-11 12:44:23,615 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 12:44:23,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-11 12:44:23,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-11 12:44:23,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 12:44:23,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-11 12:44:23,624 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-11 12:44:23,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:23,625 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-11 12:44:23,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 12:44:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-11 12:44:23,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-11 12:44:23,626 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:23,626 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:23,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-11 12:44:23,627 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:23,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:23,627 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-10-11 12:44:23,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:23,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105728392] [2020-10-11 12:44:23,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:23,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105728392] [2020-10-11 12:44:23,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:23,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 12:44:23,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118798839] [2020-10-11 12:44:23,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 12:44:23,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:23,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 12:44:23,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-11 12:44:23,729 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-11 12:44:23,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:23,787 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-11 12:44:23,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 12:44:23,787 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-11 12:44:23,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:23,789 INFO L225 Difference]: With dead ends: 86 [2020-10-11 12:44:23,789 INFO L226 Difference]: Without dead ends: 80 [2020-10-11 12:44:23,789 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-11 12:44:23,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-11 12:44:23,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-11 12:44:23,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 12:44:23,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-11 12:44:23,799 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-11 12:44:23,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:23,799 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-11 12:44:23,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 12:44:23,800 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-11 12:44:23,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-11 12:44:23,801 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:23,801 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:23,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-11 12:44:23,802 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:23,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:23,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-10-11 12:44:23,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:23,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785052351] [2020-10-11 12:44:23,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:23,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785052351] [2020-10-11 12:44:23,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078182128] [2020-10-11 12:44:23,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:23,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:23,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:23,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 12:44:23,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:24,053 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:24,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:24,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-11 12:44:24,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148563099] [2020-10-11 12:44:24,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 12:44:24,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:24,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 12:44:24,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-11 12:44:24,077 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-11 12:44:24,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:24,148 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-11 12:44:24,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:24,149 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-11 12:44:24,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:24,150 INFO L225 Difference]: With dead ends: 101 [2020-10-11 12:44:24,150 INFO L226 Difference]: Without dead ends: 96 [2020-10-11 12:44:24,151 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:24,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-11 12:44:24,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-11 12:44:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-11 12:44:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-11 12:44:24,159 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-11 12:44:24,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:24,159 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-11 12:44:24,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 12:44:24,160 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-11 12:44:24,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-11 12:44:24,161 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:24,161 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:24,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:24,376 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:24,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:24,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-10-11 12:44:24,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:24,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150288700] [2020-10-11 12:44:24,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:24,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150288700] [2020-10-11 12:44:24,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036649311] [2020-10-11 12:44:24,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:24,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:24,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:24,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 12:44:24,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:24,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:24,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-11 12:44:24,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672711060] [2020-10-11 12:44:24,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 12:44:24,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:24,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 12:44:24,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 12:44:24,563 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-11 12:44:24,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:24,591 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-11 12:44:24,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 12:44:24,591 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-11 12:44:24,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:24,592 INFO L225 Difference]: With dead ends: 84 [2020-10-11 12:44:24,592 INFO L226 Difference]: Without dead ends: 81 [2020-10-11 12:44:24,593 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 12:44:24,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-11 12:44:24,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-11 12:44:24,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 12:44:24,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-11 12:44:24,600 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-11 12:44:24,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:24,601 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-11 12:44:24,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 12:44:24,601 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-11 12:44:24,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-11 12:44:24,602 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:24,602 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:24,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:24,817 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:24,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:24,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-10-11 12:44:24,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:24,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909355985] [2020-10-11 12:44:24,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:24,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909355985] [2020-10-11 12:44:24,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721811254] [2020-10-11 12:44:24,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:24,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:24,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:24,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 12:44:24,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:24,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:24,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-11 12:44:24,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111801966] [2020-10-11 12:44:24,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 12:44:24,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:24,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 12:44:24,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-11 12:44:24,999 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-11 12:44:25,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:25,044 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-11 12:44:25,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 12:44:25,045 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-11 12:44:25,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:25,046 INFO L225 Difference]: With dead ends: 90 [2020-10-11 12:44:25,046 INFO L226 Difference]: Without dead ends: 87 [2020-10-11 12:44:25,047 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-11 12:44:25,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-11 12:44:25,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-11 12:44:25,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 12:44:25,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-11 12:44:25,054 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-11 12:44:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:25,054 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-11 12:44:25,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 12:44:25,055 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-11 12:44:25,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-11 12:44:25,056 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:25,056 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:25,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:25,266 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:25,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:25,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-10-11 12:44:25,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:25,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299865692] [2020-10-11 12:44:25,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:25,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299865692] [2020-10-11 12:44:25,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373966033] [2020-10-11 12:44:25,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:25,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:25,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:25,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 12:44:25,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:25,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:25,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:25,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-11 12:44:25,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887857264] [2020-10-11 12:44:25,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 12:44:25,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:25,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 12:44:25,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-11 12:44:25,446 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-11 12:44:25,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:25,538 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-11 12:44:25,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:25,539 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-11 12:44:25,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:25,540 INFO L225 Difference]: With dead ends: 99 [2020-10-11 12:44:25,540 INFO L226 Difference]: Without dead ends: 93 [2020-10-11 12:44:25,540 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-11 12:44:25,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-11 12:44:25,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-11 12:44:25,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-11 12:44:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-11 12:44:25,547 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-11 12:44:25,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:25,547 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-11 12:44:25,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 12:44:25,547 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-11 12:44:25,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:25,548 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:25,548 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:25,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:25,764 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:25,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:25,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-10-11 12:44:25,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:25,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768978843] [2020-10-11 12:44:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:25,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768978843] [2020-10-11 12:44:25,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:25,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 12:44:25,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094788324] [2020-10-11 12:44:25,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 12:44:25,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:25,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 12:44:25,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-11 12:44:25,852 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-11 12:44:25,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:25,885 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-11 12:44:25,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 12:44:25,886 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 12:44:25,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:25,887 INFO L225 Difference]: With dead ends: 92 [2020-10-11 12:44:25,887 INFO L226 Difference]: Without dead ends: 90 [2020-10-11 12:44:25,887 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-11 12:44:25,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-11 12:44:25,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-11 12:44:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-11 12:44:25,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-11 12:44:25,903 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-11 12:44:25,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:25,903 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-11 12:44:25,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 12:44:25,903 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-11 12:44:25,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:25,905 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:25,905 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:25,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-11 12:44:25,905 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:25,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:25,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-10-11 12:44:25,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:25,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527645200] [2020-10-11 12:44:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:26,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527645200] [2020-10-11 12:44:26,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:26,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 12:44:26,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254050986] [2020-10-11 12:44:26,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 12:44:26,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:26,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 12:44:26,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-11 12:44:26,045 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-11 12:44:26,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:26,095 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-11 12:44:26,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 12:44:26,096 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 12:44:26,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:26,098 INFO L225 Difference]: With dead ends: 100 [2020-10-11 12:44:26,098 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 12:44:26,098 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-11 12:44:26,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 12:44:26,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-11 12:44:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-11 12:44:26,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-11 12:44:26,113 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-11 12:44:26,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:26,114 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-11 12:44:26,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 12:44:26,114 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-11 12:44:26,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:26,115 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:26,115 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:26,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-11 12:44:26,116 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:26,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:26,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-10-11 12:44:26,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:26,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487766420] [2020-10-11 12:44:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:26,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487766420] [2020-10-11 12:44:26,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:26,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 12:44:26,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309694100] [2020-10-11 12:44:26,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 12:44:26,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:26,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 12:44:26,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-11 12:44:26,197 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-11 12:44:26,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:26,267 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-11 12:44:26,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:26,267 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 12:44:26,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:26,268 INFO L225 Difference]: With dead ends: 105 [2020-10-11 12:44:26,269 INFO L226 Difference]: Without dead ends: 100 [2020-10-11 12:44:26,269 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-11 12:44:26,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-11 12:44:26,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-11 12:44:26,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 12:44:26,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-11 12:44:26,273 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-11 12:44:26,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:26,274 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-11 12:44:26,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 12:44:26,274 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-11 12:44:26,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:26,275 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:26,275 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:26,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-11 12:44:26,275 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:26,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:26,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-10-11 12:44:26,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:26,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736168323] [2020-10-11 12:44:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:26,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736168323] [2020-10-11 12:44:26,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:26,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 12:44:26,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429462596] [2020-10-11 12:44:26,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 12:44:26,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:26,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 12:44:26,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-11 12:44:26,322 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-11 12:44:26,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:26,382 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-11 12:44:26,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:26,383 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 12:44:26,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:26,384 INFO L225 Difference]: With dead ends: 105 [2020-10-11 12:44:26,384 INFO L226 Difference]: Without dead ends: 100 [2020-10-11 12:44:26,384 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-11 12:44:26,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-11 12:44:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-11 12:44:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 12:44:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-11 12:44:26,388 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-11 12:44:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:26,389 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-11 12:44:26,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 12:44:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-11 12:44:26,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:26,390 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:26,390 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:26,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-11 12:44:26,390 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:26,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:26,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-10-11 12:44:26,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:26,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021001621] [2020-10-11 12:44:26,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:26,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021001621] [2020-10-11 12:44:26,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408722454] [2020-10-11 12:44:26,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:26,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:26,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:26,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:26,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:26,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:26,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:26,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-11 12:44:26,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835268897] [2020-10-11 12:44:26,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 12:44:26,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:26,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 12:44:26,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-11 12:44:26,584 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-11 12:44:26,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:26,664 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-11 12:44:26,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:26,666 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-11 12:44:26,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:26,667 INFO L225 Difference]: With dead ends: 122 [2020-10-11 12:44:26,667 INFO L226 Difference]: Without dead ends: 117 [2020-10-11 12:44:26,667 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:44:26,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-11 12:44:26,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-11 12:44:26,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-11 12:44:26,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-11 12:44:26,675 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-11 12:44:26,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:26,676 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-11 12:44:26,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 12:44:26,676 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-11 12:44:26,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:26,676 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:26,677 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:26,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-11 12:44:26,889 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:26,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:26,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-10-11 12:44:26,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:26,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357010574] [2020-10-11 12:44:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:26,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357010574] [2020-10-11 12:44:26,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63961635] [2020-10-11 12:44:26,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:27,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:27,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:27,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:27,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:27,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:27,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:27,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615968435] [2020-10-11 12:44:27,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:27,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:27,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:27,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:27,088 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-11 12:44:27,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:27,117 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-11 12:44:27,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 12:44:27,118 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-11 12:44:27,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:27,119 INFO L225 Difference]: With dead ends: 108 [2020-10-11 12:44:27,119 INFO L226 Difference]: Without dead ends: 105 [2020-10-11 12:44:27,119 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:27,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-11 12:44:27,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-11 12:44:27,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-11 12:44:27,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-11 12:44:27,124 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-11 12:44:27,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:27,124 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-11 12:44:27,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:27,124 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-11 12:44:27,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:27,125 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:27,125 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:27,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:27,335 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:27,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:27,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-10-11 12:44:27,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:27,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603601259] [2020-10-11 12:44:27,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:27,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603601259] [2020-10-11 12:44:27,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18658031] [2020-10-11 12:44:27,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:27,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:27,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:27,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:27,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:27,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499574510] [2020-10-11 12:44:27,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:27,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:27,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:27,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:27,536 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-11 12:44:27,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:27,601 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-11 12:44:27,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:44:27,602 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-11 12:44:27,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:27,603 INFO L225 Difference]: With dead ends: 116 [2020-10-11 12:44:27,603 INFO L226 Difference]: Without dead ends: 113 [2020-10-11 12:44:27,604 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-11 12:44:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-11 12:44:27,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-11 12:44:27,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 12:44:27,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-11 12:44:27,610 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-11 12:44:27,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:27,611 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-11 12:44:27,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:27,611 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-11 12:44:27,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:27,612 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:27,612 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:27,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-11 12:44:27,827 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:27,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:27,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-10-11 12:44:27,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:27,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132156311] [2020-10-11 12:44:27,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:27,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132156311] [2020-10-11 12:44:27,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905574936] [2020-10-11 12:44:27,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:27,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:27,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:27,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:27,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:28,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:28,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:28,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32222989] [2020-10-11 12:44:28,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:28,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:28,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:28,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:28,043 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-11 12:44:28,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:28,121 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-11 12:44:28,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:28,121 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-11 12:44:28,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:28,122 INFO L225 Difference]: With dead ends: 115 [2020-10-11 12:44:28,122 INFO L226 Difference]: Without dead ends: 112 [2020-10-11 12:44:28,123 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:28,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-11 12:44:28,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-11 12:44:28,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-11 12:44:28,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-11 12:44:28,127 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-11 12:44:28,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:28,127 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-11 12:44:28,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:28,128 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-11 12:44:28,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:28,128 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:28,128 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:28,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-11 12:44:28,330 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:28,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-10-11 12:44:28,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:28,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572121563] [2020-10-11 12:44:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:28,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572121563] [2020-10-11 12:44:28,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970420770] [2020-10-11 12:44:28,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:28,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:28,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:28,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:28,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:28,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:28,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:28,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:28,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611000082] [2020-10-11 12:44:28,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:28,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:28,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:28,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:28,505 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-11 12:44:28,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:28,615 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-11 12:44:28,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:28,616 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-11 12:44:28,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:28,617 INFO L225 Difference]: With dead ends: 124 [2020-10-11 12:44:28,617 INFO L226 Difference]: Without dead ends: 118 [2020-10-11 12:44:28,618 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:44:28,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-11 12:44:28,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-11 12:44:28,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-11 12:44:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-11 12:44:28,623 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-11 12:44:28,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:28,623 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-11 12:44:28,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:28,623 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-11 12:44:28,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:28,624 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:28,624 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:28,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-11 12:44:28,837 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:28,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:28,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-10-11 12:44:28,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:28,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029297139] [2020-10-11 12:44:28,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:28,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029297139] [2020-10-11 12:44:28,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268800400] [2020-10-11 12:44:28,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:28,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:28,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:28,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:28,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:29,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:29,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:29,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362755953] [2020-10-11 12:44:29,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:29,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:29,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:29,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:29,024 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-11 12:44:29,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:29,062 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-11 12:44:29,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 12:44:29,062 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:29,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:29,063 INFO L225 Difference]: With dead ends: 113 [2020-10-11 12:44:29,063 INFO L226 Difference]: Without dead ends: 111 [2020-10-11 12:44:29,064 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:29,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-11 12:44:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-11 12:44:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-11 12:44:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-11 12:44:29,067 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-11 12:44:29,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:29,067 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-11 12:44:29,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:29,068 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-11 12:44:29,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:29,068 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:29,068 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:29,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-11 12:44:29,277 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:29,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:29,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-10-11 12:44:29,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:29,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307565647] [2020-10-11 12:44:29,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:29,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307565647] [2020-10-11 12:44:29,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711172926] [2020-10-11 12:44:29,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:29,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:29,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:29,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:29,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:29,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:29,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:29,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275337125] [2020-10-11 12:44:29,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:29,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:29,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:29,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:29,466 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-11 12:44:29,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:29,525 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-11 12:44:29,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:44:29,526 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:29,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:29,527 INFO L225 Difference]: With dead ends: 118 [2020-10-11 12:44:29,527 INFO L226 Difference]: Without dead ends: 116 [2020-10-11 12:44:29,528 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:29,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-11 12:44:29,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-11 12:44:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-11 12:44:29,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-11 12:44:29,532 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-11 12:44:29,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:29,532 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-11 12:44:29,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:29,532 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-11 12:44:29,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:29,533 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:29,533 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:29,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:29,743 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:29,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:29,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-10-11 12:44:29,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:29,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43623880] [2020-10-11 12:44:29,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:29,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43623880] [2020-10-11 12:44:29,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661891967] [2020-10-11 12:44:29,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:29,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:29,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:29,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:29,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:29,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128252772] [2020-10-11 12:44:29,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:29,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:29,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:29,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:29,933 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-11 12:44:30,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:30,021 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-11 12:44:30,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:44:30,021 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:30,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:30,022 INFO L225 Difference]: With dead ends: 119 [2020-10-11 12:44:30,022 INFO L226 Difference]: Without dead ends: 117 [2020-10-11 12:44:30,022 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:30,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-11 12:44:30,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-11 12:44:30,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-11 12:44:30,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-11 12:44:30,026 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-11 12:44:30,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:30,026 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-11 12:44:30,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:30,027 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-11 12:44:30,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:30,027 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:30,027 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:30,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:30,238 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:30,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:30,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-10-11 12:44:30,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:30,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175870880] [2020-10-11 12:44:30,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:30,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175870880] [2020-10-11 12:44:30,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495340597] [2020-10-11 12:44:30,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:30,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:30,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:30,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:30,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:30,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:30,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:30,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:30,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958076340] [2020-10-11 12:44:30,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:30,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:30,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:30,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:30,430 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-11 12:44:30,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:30,486 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-11 12:44:30,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:44:30,490 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:30,491 INFO L225 Difference]: With dead ends: 122 [2020-10-11 12:44:30,491 INFO L226 Difference]: Without dead ends: 120 [2020-10-11 12:44:30,492 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-11 12:44:30,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-11 12:44:30,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-11 12:44:30,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-11 12:44:30,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-11 12:44:30,495 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-11 12:44:30,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:30,496 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-11 12:44:30,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:30,496 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-11 12:44:30,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:30,496 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:30,497 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:30,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-11 12:44:30,707 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:30,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:30,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-10-11 12:44:30,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:30,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078215785] [2020-10-11 12:44:30,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:30,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078215785] [2020-10-11 12:44:30,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565839695] [2020-10-11 12:44:30,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:30,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:30,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:30,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:30,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:30,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:30,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:30,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100460269] [2020-10-11 12:44:30,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:30,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:30,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:30,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:30,888 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-11 12:44:30,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:30,971 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-11 12:44:30,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:30,971 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:30,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:30,972 INFO L225 Difference]: With dead ends: 123 [2020-10-11 12:44:30,972 INFO L226 Difference]: Without dead ends: 121 [2020-10-11 12:44:30,973 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-11 12:44:30,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-11 12:44:30,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-11 12:44:30,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 12:44:30,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-11 12:44:30,977 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-11 12:44:30,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:30,977 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-11 12:44:30,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:30,977 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-11 12:44:30,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:30,978 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:30,978 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:31,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:31,187 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:31,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:31,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-10-11 12:44:31,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:31,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504554277] [2020-10-11 12:44:31,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:31,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504554277] [2020-10-11 12:44:31,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633647628] [2020-10-11 12:44:31,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:31,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:31,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:31,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:31,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:31,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:31,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:31,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287823634] [2020-10-11 12:44:31,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:31,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:31,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:31,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:31,366 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-11 12:44:31,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:31,440 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-11 12:44:31,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:31,440 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:31,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:31,441 INFO L225 Difference]: With dead ends: 123 [2020-10-11 12:44:31,442 INFO L226 Difference]: Without dead ends: 121 [2020-10-11 12:44:31,442 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-11 12:44:31,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-11 12:44:31,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-11 12:44:31,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-11 12:44:31,446 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-11 12:44:31,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:31,447 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-11 12:44:31,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:31,447 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-11 12:44:31,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:31,449 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:31,449 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:31,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-11 12:44:31,659 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:31,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:31,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-10-11 12:44:31,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:31,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923091725] [2020-10-11 12:44:31,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:31,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923091725] [2020-10-11 12:44:31,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699603826] [2020-10-11 12:44:31,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:31,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:31,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:31,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:31,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:31,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:31,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:31,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:31,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160347026] [2020-10-11 12:44:31,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:31,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:31,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:31,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:31,890 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-11 12:44:32,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:32,041 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-11 12:44:32,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:32,041 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:32,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:32,042 INFO L225 Difference]: With dead ends: 133 [2020-10-11 12:44:32,043 INFO L226 Difference]: Without dead ends: 128 [2020-10-11 12:44:32,043 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:44:32,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-11 12:44:32,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-11 12:44:32,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-11 12:44:32,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-11 12:44:32,047 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-11 12:44:32,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:32,047 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-11 12:44:32,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:32,047 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-11 12:44:32,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:32,048 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:32,048 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:32,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:32,259 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:32,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:32,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-10-11 12:44:32,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:32,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747546176] [2020-10-11 12:44:32,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:32,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747546176] [2020-10-11 12:44:32,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484874587] [2020-10-11 12:44:32,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:32,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:32,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:32,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:32,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:32,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:32,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:32,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:32,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612112451] [2020-10-11 12:44:32,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:32,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:32,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:32,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:32,450 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-11 12:44:32,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:32,577 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-11 12:44:32,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:32,577 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:32,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:32,579 INFO L225 Difference]: With dead ends: 127 [2020-10-11 12:44:32,579 INFO L226 Difference]: Without dead ends: 125 [2020-10-11 12:44:32,579 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:44:32,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-11 12:44:32,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-11 12:44:32,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-11 12:44:32,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-11 12:44:32,583 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-11 12:44:32,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:32,583 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-11 12:44:32,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:32,584 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-11 12:44:32,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:32,584 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:32,584 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:32,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-11 12:44:32,796 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:32,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:32,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-10-11 12:44:32,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:32,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41649564] [2020-10-11 12:44:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:32,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41649564] [2020-10-11 12:44:32,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768837591] [2020-10-11 12:44:32,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:32,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:32,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:32,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:32,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:32,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:32,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769459264] [2020-10-11 12:44:32,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:32,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:32,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:32,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:32,948 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-11 12:44:33,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:33,141 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-11 12:44:33,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:44:33,142 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:33,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:33,143 INFO L225 Difference]: With dead ends: 141 [2020-10-11 12:44:33,143 INFO L226 Difference]: Without dead ends: 136 [2020-10-11 12:44:33,143 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:44:33,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-11 12:44:33,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-11 12:44:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-11 12:44:33,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-11 12:44:33,148 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-11 12:44:33,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:33,148 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-11 12:44:33,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:33,149 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-11 12:44:33,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:33,149 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:33,149 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:33,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-11 12:44:33,353 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:33,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:33,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-10-11 12:44:33,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:33,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691950167] [2020-10-11 12:44:33,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:33,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691950167] [2020-10-11 12:44:33,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373067756] [2020-10-11 12:44:33,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:33,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:33,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:33,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:33,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:33,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:33,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:33,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:33,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717166434] [2020-10-11 12:44:33,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:33,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:33,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:33,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:33,511 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-11 12:44:33,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:33,655 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-11 12:44:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:33,656 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:33,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:33,657 INFO L225 Difference]: With dead ends: 136 [2020-10-11 12:44:33,657 INFO L226 Difference]: Without dead ends: 131 [2020-10-11 12:44:33,657 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:44:33,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-11 12:44:33,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-11 12:44:33,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-11 12:44:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-11 12:44:33,661 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-11 12:44:33,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:33,661 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-11 12:44:33,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:33,662 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-11 12:44:33,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:33,662 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:33,662 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:33,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-11 12:44:33,870 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:33,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:33,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-10-11 12:44:33,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:33,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012518578] [2020-10-11 12:44:33,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:33,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012518578] [2020-10-11 12:44:33,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612435550] [2020-10-11 12:44:33,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:33,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:33,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:33,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:33,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:34,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:34,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:34,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183052231] [2020-10-11 12:44:34,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:34,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:34,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:34,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:34,041 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-11 12:44:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:34,129 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-11 12:44:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:34,130 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:34,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:34,131 INFO L225 Difference]: With dead ends: 130 [2020-10-11 12:44:34,131 INFO L226 Difference]: Without dead ends: 128 [2020-10-11 12:44:34,131 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-11 12:44:34,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-11 12:44:34,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-11 12:44:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 12:44:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-11 12:44:34,136 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-11 12:44:34,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:34,137 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-11 12:44:34,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:34,137 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-11 12:44:34,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:34,137 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:34,138 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:34,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-11 12:44:34,348 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:34,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:34,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-10-11 12:44:34,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:34,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360052627] [2020-10-11 12:44:34,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:34,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360052627] [2020-10-11 12:44:34,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767964056] [2020-10-11 12:44:34,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:34,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:34,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:34,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:34,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:34,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:34,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:34,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190905243] [2020-10-11 12:44:34,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:34,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:34,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:34,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:34,535 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-11 12:44:34,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:34,652 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-11 12:44:34,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:44:34,652 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:34,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:34,654 INFO L225 Difference]: With dead ends: 131 [2020-10-11 12:44:34,654 INFO L226 Difference]: Without dead ends: 129 [2020-10-11 12:44:34,654 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:44:34,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-11 12:44:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-11 12:44:34,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-11 12:44:34,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-11 12:44:34,658 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-11 12:44:34,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:34,658 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-11 12:44:34,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:34,658 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-11 12:44:34,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:34,659 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:34,659 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:34,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-11 12:44:34,870 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:34,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:34,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-10-11 12:44:34,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:34,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309814847] [2020-10-11 12:44:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:34,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309814847] [2020-10-11 12:44:34,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342389085] [2020-10-11 12:44:34,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:34,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:34,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:34,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:34,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:35,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:35,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:35,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:35,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110654209] [2020-10-11 12:44:35,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:35,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:35,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:35,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:35,030 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-11 12:44:35,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:35,148 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-11 12:44:35,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:35,149 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:35,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:35,150 INFO L225 Difference]: With dead ends: 131 [2020-10-11 12:44:35,151 INFO L226 Difference]: Without dead ends: 126 [2020-10-11 12:44:35,151 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:44:35,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-11 12:44:35,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-11 12:44:35,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-11 12:44:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-11 12:44:35,155 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-11 12:44:35,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:35,155 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-11 12:44:35,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:35,156 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-11 12:44:35,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:35,156 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:35,156 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:35,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:35,368 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:35,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:35,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-10-11 12:44:35,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:35,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159392848] [2020-10-11 12:44:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:35,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159392848] [2020-10-11 12:44:35,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779040474] [2020-10-11 12:44:35,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:35,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:35,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:35,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:35,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:35,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:35,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:35,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:35,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846163269] [2020-10-11 12:44:35,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:35,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:35,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:35,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:35,522 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-11 12:44:35,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:35,726 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-11 12:44:35,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:44:35,726 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:35,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:35,727 INFO L225 Difference]: With dead ends: 145 [2020-10-11 12:44:35,728 INFO L226 Difference]: Without dead ends: 140 [2020-10-11 12:44:35,728 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:44:35,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-11 12:44:35,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-11 12:44:35,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 12:44:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-11 12:44:35,733 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-11 12:44:35,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:35,733 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-11 12:44:35,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:35,733 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-11 12:44:35,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:35,734 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:35,734 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:35,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-11 12:44:35,945 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:35,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:35,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-10-11 12:44:35,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:35,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950393283] [2020-10-11 12:44:35,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:35,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950393283] [2020-10-11 12:44:35,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307238453] [2020-10-11 12:44:35,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:36,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:36,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:36,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:36,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:36,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:36,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024781567] [2020-10-11 12:44:36,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:36,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:36,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:36,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:36,094 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-11 12:44:36,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:36,254 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-11 12:44:36,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:36,254 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:36,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:36,256 INFO L225 Difference]: With dead ends: 135 [2020-10-11 12:44:36,256 INFO L226 Difference]: Without dead ends: 130 [2020-10-11 12:44:36,256 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:44:36,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-11 12:44:36,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-11 12:44:36,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-11 12:44:36,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-11 12:44:36,260 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-11 12:44:36,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:36,260 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-11 12:44:36,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:36,261 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-11 12:44:36,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:36,261 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:36,261 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:36,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:36,472 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:36,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:36,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-10-11 12:44:36,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:36,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839348688] [2020-10-11 12:44:36,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:36,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839348688] [2020-10-11 12:44:36,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192536657] [2020-10-11 12:44:36,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:36,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:36,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:36,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:36,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:36,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:36,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:36,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-11 12:44:36,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030436572] [2020-10-11 12:44:36,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 12:44:36,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:36,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 12:44:36,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-11 12:44:36,687 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-11 12:44:36,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:36,792 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-11 12:44:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:36,792 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-11 12:44:36,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:36,794 INFO L225 Difference]: With dead ends: 143 [2020-10-11 12:44:36,794 INFO L226 Difference]: Without dead ends: 138 [2020-10-11 12:44:36,794 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:44:36,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-11 12:44:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-11 12:44:36,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-11 12:44:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-11 12:44:36,798 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-11 12:44:36,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:36,798 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-11 12:44:36,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 12:44:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-11 12:44:36,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:36,799 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:36,799 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:37,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-11 12:44:37,003 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:37,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-10-11 12:44:37,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:37,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146871592] [2020-10-11 12:44:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:37,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146871592] [2020-10-11 12:44:37,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142734281] [2020-10-11 12:44:37,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:37,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:37,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:37,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:37,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:37,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:37,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:37,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411418089] [2020-10-11 12:44:37,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:37,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:37,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:37,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:37,281 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-11 12:44:37,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:37,335 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-11 12:44:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:44:37,336 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-11 12:44:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:37,338 INFO L225 Difference]: With dead ends: 132 [2020-10-11 12:44:37,338 INFO L226 Difference]: Without dead ends: 129 [2020-10-11 12:44:37,338 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:37,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-11 12:44:37,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-11 12:44:37,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-11 12:44:37,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-11 12:44:37,344 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-11 12:44:37,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:37,344 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-11 12:44:37,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:37,344 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-11 12:44:37,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:37,345 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:37,345 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:37,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-11 12:44:37,556 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:37,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:37,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-10-11 12:44:37,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:37,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614854842] [2020-10-11 12:44:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:37,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614854842] [2020-10-11 12:44:37,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123553922] [2020-10-11 12:44:37,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:37,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:44:37,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:37,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:37,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:37,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:37,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:37,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651679103] [2020-10-11 12:44:37,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:37,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:37,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:37,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:37,893 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-11 12:44:37,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:37,964 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-11 12:44:37,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:37,965 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-11 12:44:37,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:37,966 INFO L225 Difference]: With dead ends: 143 [2020-10-11 12:44:37,966 INFO L226 Difference]: Without dead ends: 140 [2020-10-11 12:44:37,967 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-11 12:44:37,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-11 12:44:37,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-11 12:44:37,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-11 12:44:37,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-11 12:44:37,972 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-11 12:44:37,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:37,972 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-11 12:44:37,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:37,973 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-11 12:44:37,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:37,973 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:37,973 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:38,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-11 12:44:38,186 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:38,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:38,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-10-11 12:44:38,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:38,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050594627] [2020-10-11 12:44:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:38,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050594627] [2020-10-11 12:44:38,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024212633] [2020-10-11 12:44:38,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:38,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:44:38,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:38,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:38,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:38,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:38,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:38,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228629536] [2020-10-11 12:44:38,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:38,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:38,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:38,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:38,384 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-11 12:44:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:38,464 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-11 12:44:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:38,464 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-11 12:44:38,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:38,465 INFO L225 Difference]: With dead ends: 142 [2020-10-11 12:44:38,466 INFO L226 Difference]: Without dead ends: 139 [2020-10-11 12:44:38,466 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:44:38,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-11 12:44:38,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-11 12:44:38,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-11 12:44:38,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-11 12:44:38,470 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-11 12:44:38,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:38,470 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-11 12:44:38,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:38,471 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-11 12:44:38,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:38,471 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:38,471 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:38,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-11 12:44:38,681 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:38,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:38,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-10-11 12:44:38,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:38,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955514385] [2020-10-11 12:44:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:38,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955514385] [2020-10-11 12:44:38,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742530840] [2020-10-11 12:44:38,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:38,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:38,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:38,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:38,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:38,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15291603] [2020-10-11 12:44:38,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:38,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:38,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:38,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:38,903 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-11 12:44:39,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:39,001 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-11 12:44:39,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:39,002 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-11 12:44:39,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:39,004 INFO L225 Difference]: With dead ends: 141 [2020-10-11 12:44:39,004 INFO L226 Difference]: Without dead ends: 138 [2020-10-11 12:44:39,004 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:44:39,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-11 12:44:39,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-11 12:44:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-11 12:44:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-11 12:44:39,008 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-11 12:44:39,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:39,009 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-11 12:44:39,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:39,009 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-11 12:44:39,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:39,009 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:39,009 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:39,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-11 12:44:39,219 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:39,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:39,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-10-11 12:44:39,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:39,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380165523] [2020-10-11 12:44:39,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:39,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380165523] [2020-10-11 12:44:39,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551647779] [2020-10-11 12:44:39,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:39,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:39,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:39,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:39,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:39,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:39,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:39,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:39,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018215853] [2020-10-11 12:44:39,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:39,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:39,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:39,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:39,395 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-11 12:44:39,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:39,559 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-11 12:44:39,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:39,559 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-11 12:44:39,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:39,561 INFO L225 Difference]: With dead ends: 150 [2020-10-11 12:44:39,561 INFO L226 Difference]: Without dead ends: 144 [2020-10-11 12:44:39,562 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:44:39,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-11 12:44:39,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-11 12:44:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-11 12:44:39,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-11 12:44:39,567 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-11 12:44:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:39,567 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-11 12:44:39,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:39,568 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-11 12:44:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:39,568 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:39,569 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:39,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:39,780 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:39,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:39,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-10-11 12:44:39,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:39,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760805427] [2020-10-11 12:44:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:39,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760805427] [2020-10-11 12:44:39,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423678613] [2020-10-11 12:44:39,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:39,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:39,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:39,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:39,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:40,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:40,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:40,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908238400] [2020-10-11 12:44:40,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:40,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:40,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:40,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:40,061 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-11 12:44:40,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:40,121 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-11 12:44:40,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:44:40,122 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:40,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:40,124 INFO L225 Difference]: With dead ends: 138 [2020-10-11 12:44:40,124 INFO L226 Difference]: Without dead ends: 136 [2020-10-11 12:44:40,124 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:40,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-11 12:44:40,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-11 12:44:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-11 12:44:40,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-11 12:44:40,129 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-11 12:44:40,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:40,130 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-11 12:44:40,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:40,130 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-11 12:44:40,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:40,131 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:40,131 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:40,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-11 12:44:40,344 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:40,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:40,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-10-11 12:44:40,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:40,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647441045] [2020-10-11 12:44:40,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:40,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647441045] [2020-10-11 12:44:40,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687067144] [2020-10-11 12:44:40,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:40,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:40,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:40,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:40,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:40,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:40,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:40,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99431064] [2020-10-11 12:44:40,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:40,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:40,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:40,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:40,592 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-11 12:44:40,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:40,702 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-11 12:44:40,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:40,704 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:40,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:40,706 INFO L225 Difference]: With dead ends: 145 [2020-10-11 12:44:40,706 INFO L226 Difference]: Without dead ends: 143 [2020-10-11 12:44:40,706 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:44:40,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-11 12:44:40,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-11 12:44:40,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-11 12:44:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-11 12:44:40,709 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-11 12:44:40,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:40,710 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-11 12:44:40,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:40,710 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-11 12:44:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:40,710 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:40,710 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:40,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-11 12:44:40,914 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:40,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:40,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-10-11 12:44:40,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:40,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346721887] [2020-10-11 12:44:40,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:40,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346721887] [2020-10-11 12:44:40,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370697257] [2020-10-11 12:44:40,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:41,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:41,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:41,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:41,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:41,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:41,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:41,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488905571] [2020-10-11 12:44:41,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:41,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:41,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:41,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:41,140 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-11 12:44:41,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:41,259 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-11 12:44:41,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:41,260 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:41,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:41,261 INFO L225 Difference]: With dead ends: 150 [2020-10-11 12:44:41,261 INFO L226 Difference]: Without dead ends: 148 [2020-10-11 12:44:41,262 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:44:41,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-11 12:44:41,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-11 12:44:41,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-11 12:44:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-11 12:44:41,266 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-11 12:44:41,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:41,267 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-11 12:44:41,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:41,267 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-11 12:44:41,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:41,267 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:41,268 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:41,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:41,480 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:41,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:41,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-10-11 12:44:41,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:41,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755388413] [2020-10-11 12:44:41,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:41,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755388413] [2020-10-11 12:44:41,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520171098] [2020-10-11 12:44:41,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:41,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:44:41,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:41,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:41,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:41,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:41,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:41,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651757468] [2020-10-11 12:44:41,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:41,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:41,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:41,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:41,696 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-11 12:44:41,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:41,839 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-11 12:44:41,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:41,840 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:41,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:41,841 INFO L225 Difference]: With dead ends: 148 [2020-10-11 12:44:41,841 INFO L226 Difference]: Without dead ends: 146 [2020-10-11 12:44:41,842 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:44:41,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-11 12:44:41,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-11 12:44:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-11 12:44:41,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-11 12:44:41,846 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-11 12:44:41,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:41,847 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-11 12:44:41,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:41,847 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-11 12:44:41,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:41,848 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:41,848 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:42,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-11 12:44:42,049 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:42,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:42,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-10-11 12:44:42,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:42,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929890298] [2020-10-11 12:44:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:42,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929890298] [2020-10-11 12:44:42,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490054302] [2020-10-11 12:44:42,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:42,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:42,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:42,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:42,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:42,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:42,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:42,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454134369] [2020-10-11 12:44:42,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:42,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:42,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:42,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:42,289 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-11 12:44:42,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:42,395 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-11 12:44:42,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:42,395 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:42,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:42,396 INFO L225 Difference]: With dead ends: 149 [2020-10-11 12:44:42,397 INFO L226 Difference]: Without dead ends: 147 [2020-10-11 12:44:42,397 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:44:42,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-11 12:44:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-11 12:44:42,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-11 12:44:42,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-11 12:44:42,400 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-11 12:44:42,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:42,401 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-11 12:44:42,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:42,401 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-11 12:44:42,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:42,401 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:42,401 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:42,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:42,610 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:42,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:42,611 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-10-11 12:44:42,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:42,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002684007] [2020-10-11 12:44:42,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:42,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002684007] [2020-10-11 12:44:42,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446010048] [2020-10-11 12:44:42,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:42,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:42,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:42,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:42,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:42,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571078381] [2020-10-11 12:44:42,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:42,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:42,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:42,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:42,818 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-11 12:44:42,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:42,881 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-11 12:44:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:42,882 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:42,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:42,883 INFO L225 Difference]: With dead ends: 152 [2020-10-11 12:44:42,883 INFO L226 Difference]: Without dead ends: 150 [2020-10-11 12:44:42,883 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-11 12:44:42,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-11 12:44:42,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-11 12:44:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-11 12:44:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-11 12:44:42,887 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-11 12:44:42,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:42,887 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-11 12:44:42,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:42,888 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-11 12:44:42,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:42,888 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:42,888 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:43,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-11 12:44:43,099 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:43,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:43,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-10-11 12:44:43,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:43,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274462156] [2020-10-11 12:44:43,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:43,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274462156] [2020-10-11 12:44:43,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24483589] [2020-10-11 12:44:43,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:43,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:43,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:43,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:43,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:43,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:43,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:43,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894214179] [2020-10-11 12:44:43,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:43,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:43,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:43,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:43,321 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-11 12:44:43,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:43,469 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-11 12:44:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:44:43,469 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:43,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:43,471 INFO L225 Difference]: With dead ends: 153 [2020-10-11 12:44:43,471 INFO L226 Difference]: Without dead ends: 151 [2020-10-11 12:44:43,472 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:44:43,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-11 12:44:43,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-11 12:44:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-11 12:44:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-11 12:44:43,475 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-11 12:44:43,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:43,475 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-11 12:44:43,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:43,476 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-11 12:44:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:43,476 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:43,476 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:43,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-11 12:44:43,685 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:43,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:43,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-10-11 12:44:43,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:43,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28861373] [2020-10-11 12:44:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:43,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28861373] [2020-10-11 12:44:43,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240968631] [2020-10-11 12:44:43,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:43,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:43,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:43,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:43,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:43,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:43,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:43,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123974707] [2020-10-11 12:44:43,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:43,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:43,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:43,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:43,876 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-11 12:44:44,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:44,002 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-11 12:44:44,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:44:44,003 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:44,004 INFO L225 Difference]: With dead ends: 156 [2020-10-11 12:44:44,004 INFO L226 Difference]: Without dead ends: 154 [2020-10-11 12:44:44,005 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:44:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-11 12:44:44,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-11 12:44:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-11 12:44:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-11 12:44:44,010 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-11 12:44:44,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:44,010 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-11 12:44:44,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:44,010 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-11 12:44:44,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:44,011 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:44,011 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:44,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-11 12:44:44,220 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:44,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:44,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-10-11 12:44:44,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:44,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227206473] [2020-10-11 12:44:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:44,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227206473] [2020-10-11 12:44:44,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000613935] [2020-10-11 12:44:44,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:44,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:44,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:44,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:44,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:44,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:44,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:44,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935968598] [2020-10-11 12:44:44,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:44,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:44,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:44,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:44,469 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-11 12:44:44,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:44,562 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-11 12:44:44,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:44,563 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:44,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:44,565 INFO L225 Difference]: With dead ends: 148 [2020-10-11 12:44:44,565 INFO L226 Difference]: Without dead ends: 146 [2020-10-11 12:44:44,565 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:44:44,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-11 12:44:44,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-11 12:44:44,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-11 12:44:44,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-11 12:44:44,570 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-11 12:44:44,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:44,571 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-11 12:44:44,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:44,571 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-11 12:44:44,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:44,572 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:44,572 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:44,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-11 12:44:44,785 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:44,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:44,786 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-10-11 12:44:44,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:44,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123737938] [2020-10-11 12:44:44,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:44,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123737938] [2020-10-11 12:44:44,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072878529] [2020-10-11 12:44:44,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:44,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:44,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:44,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:44,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:44,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:44,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:44,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446688015] [2020-10-11 12:44:44,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:44,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:44,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:44,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:44,986 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-11 12:44:45,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:45,130 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-11 12:44:45,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:45,131 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:45,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:45,132 INFO L225 Difference]: With dead ends: 157 [2020-10-11 12:44:45,132 INFO L226 Difference]: Without dead ends: 155 [2020-10-11 12:44:45,133 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:44:45,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-11 12:44:45,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-11 12:44:45,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-11 12:44:45,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-11 12:44:45,136 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-11 12:44:45,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:45,136 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-11 12:44:45,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:45,136 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-11 12:44:45,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:45,137 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:45,137 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:45,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:45,338 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:45,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:45,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-10-11 12:44:45,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:45,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544565058] [2020-10-11 12:44:45,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:45,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544565058] [2020-10-11 12:44:45,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251178865] [2020-10-11 12:44:45,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:45,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:45,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:45,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:45,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:45,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:45,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:45,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586907051] [2020-10-11 12:44:45,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:45,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:45,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:45,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:45,531 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-10-11 12:44:45,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:45,633 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-11 12:44:45,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:45,633 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:45,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:45,635 INFO L225 Difference]: With dead ends: 149 [2020-10-11 12:44:45,635 INFO L226 Difference]: Without dead ends: 147 [2020-10-11 12:44:45,635 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:44:45,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-11 12:44:45,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-11 12:44:45,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-11 12:44:45,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-11 12:44:45,639 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-11 12:44:45,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:45,639 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-11 12:44:45,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:45,640 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-11 12:44:45,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:45,640 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:45,640 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:45,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-11 12:44:45,851 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:45,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:45,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-10-11 12:44:45,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:45,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49059797] [2020-10-11 12:44:45,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:45,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49059797] [2020-10-11 12:44:45,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283640222] [2020-10-11 12:44:45,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:45,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:45,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:46,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:46,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:46,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:46,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318017137] [2020-10-11 12:44:46,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:46,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:46,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:46,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:46,074 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-11 12:44:46,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:46,319 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-11 12:44:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:46,320 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:46,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:46,321 INFO L225 Difference]: With dead ends: 164 [2020-10-11 12:44:46,321 INFO L226 Difference]: Without dead ends: 159 [2020-10-11 12:44:46,322 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:44:46,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-11 12:44:46,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-11 12:44:46,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-11 12:44:46,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-11 12:44:46,325 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-11 12:44:46,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:46,325 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-11 12:44:46,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:46,325 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-11 12:44:46,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:46,326 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:46,326 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:46,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-11 12:44:46,529 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:46,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:46,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-10-11 12:44:46,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:46,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962272429] [2020-10-11 12:44:46,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:46,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962272429] [2020-10-11 12:44:46,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073524432] [2020-10-11 12:44:46,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:46,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:46,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:46,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:46,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:46,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:46,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:46,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192969864] [2020-10-11 12:44:46,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:46,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:46,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:46,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:46,728 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-11 12:44:46,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:46,892 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-11 12:44:46,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:44:46,893 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:46,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:46,894 INFO L225 Difference]: With dead ends: 156 [2020-10-11 12:44:46,894 INFO L226 Difference]: Without dead ends: 154 [2020-10-11 12:44:46,895 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:44:46,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-11 12:44:46,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-11 12:44:46,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-11 12:44:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-11 12:44:46,898 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-11 12:44:46,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:46,898 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-11 12:44:46,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:46,898 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-11 12:44:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:46,899 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:46,899 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:47,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:47,100 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:47,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:47,100 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-10-11 12:44:47,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:47,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408914209] [2020-10-11 12:44:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:47,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408914209] [2020-10-11 12:44:47,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565770814] [2020-10-11 12:44:47,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:47,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:47,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:47,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:47,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:47,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:47,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:47,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:47,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499286569] [2020-10-11 12:44:47,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:47,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:47,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:47,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:47,308 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-11 12:44:47,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:47,639 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-11 12:44:47,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:44:47,640 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:47,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:47,641 INFO L225 Difference]: With dead ends: 176 [2020-10-11 12:44:47,641 INFO L226 Difference]: Without dead ends: 171 [2020-10-11 12:44:47,642 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:44:47,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-11 12:44:47,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-11 12:44:47,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-11 12:44:47,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-11 12:44:47,646 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-11 12:44:47,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:47,646 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-11 12:44:47,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:47,646 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-11 12:44:47,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:47,647 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:47,647 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:47,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-11 12:44:47,857 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:47,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:47,857 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-10-11 12:44:47,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:47,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18317387] [2020-10-11 12:44:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:47,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18317387] [2020-10-11 12:44:47,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201311424] [2020-10-11 12:44:47,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:47,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:47,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:47,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:47,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:48,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:48,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:48,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:48,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458933390] [2020-10-11 12:44:48,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:48,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:48,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:48,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:48,049 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-11 12:44:48,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:48,281 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-11 12:44:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:48,281 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:48,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:48,282 INFO L225 Difference]: With dead ends: 166 [2020-10-11 12:44:48,282 INFO L226 Difference]: Without dead ends: 161 [2020-10-11 12:44:48,282 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:44:48,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-11 12:44:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-11 12:44:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-11 12:44:48,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-11 12:44:48,286 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-11 12:44:48,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:48,286 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-11 12:44:48,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:48,286 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-11 12:44:48,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:48,287 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:48,287 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:48,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:48,494 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:48,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:48,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-10-11 12:44:48,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:48,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616756852] [2020-10-11 12:44:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:48,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616756852] [2020-10-11 12:44:48,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647449075] [2020-10-11 12:44:48,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:48,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:48,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:48,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:48,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:48,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:48,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:48,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488096939] [2020-10-11 12:44:48,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:48,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:48,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:48,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:48,673 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-11 12:44:48,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:48,813 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-11 12:44:48,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:48,813 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:48,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:48,814 INFO L225 Difference]: With dead ends: 163 [2020-10-11 12:44:48,814 INFO L226 Difference]: Without dead ends: 161 [2020-10-11 12:44:48,815 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:44:48,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-11 12:44:48,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-11 12:44:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-11 12:44:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-11 12:44:48,818 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-11 12:44:48,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:48,818 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-11 12:44:48,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:48,818 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-11 12:44:48,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:48,819 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:48,819 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:49,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-11 12:44:49,028 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:49,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:49,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-10-11 12:44:49,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:49,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663803555] [2020-10-11 12:44:49,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:49,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663803555] [2020-10-11 12:44:49,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312605468] [2020-10-11 12:44:49,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:49,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:49,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:49,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:49,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:49,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:49,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:49,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150349977] [2020-10-11 12:44:49,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:49,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:49,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:49,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:49,249 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-11 12:44:49,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:49,508 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-11 12:44:49,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:44:49,509 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:49,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:49,510 INFO L225 Difference]: With dead ends: 170 [2020-10-11 12:44:49,510 INFO L226 Difference]: Without dead ends: 168 [2020-10-11 12:44:49,511 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-11 12:44:49,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-11 12:44:49,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-11 12:44:49,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-11 12:44:49,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-11 12:44:49,514 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-11 12:44:49,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:49,515 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-11 12:44:49,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:49,515 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-11 12:44:49,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:49,515 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:49,515 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:49,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:49,716 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:49,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:49,717 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-10-11 12:44:49,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:49,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416561832] [2020-10-11 12:44:49,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:49,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416561832] [2020-10-11 12:44:49,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229574889] [2020-10-11 12:44:49,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:49,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:49,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:49,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:49,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:49,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:49,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418235013] [2020-10-11 12:44:49,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:49,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:49,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:49,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:49,889 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-11 12:44:50,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:50,218 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-11 12:44:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:44:50,218 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:50,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:50,220 INFO L225 Difference]: With dead ends: 177 [2020-10-11 12:44:50,220 INFO L226 Difference]: Without dead ends: 172 [2020-10-11 12:44:50,220 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:44:50,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-11 12:44:50,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-11 12:44:50,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-11 12:44:50,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-11 12:44:50,223 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-11 12:44:50,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:50,224 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-11 12:44:50,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:50,224 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-11 12:44:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:50,224 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:50,225 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:50,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-11 12:44:50,436 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:50,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:50,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-10-11 12:44:50,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:50,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828389368] [2020-10-11 12:44:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:50,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828389368] [2020-10-11 12:44:50,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493567672] [2020-10-11 12:44:50,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:50,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:50,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:50,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:50,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:50,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:50,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:50,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:50,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:50,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113911078] [2020-10-11 12:44:50,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:50,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:50,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:50,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:50,603 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-11 12:44:50,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:50,953 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-11 12:44:50,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:44:50,954 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:50,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:50,956 INFO L225 Difference]: With dead ends: 190 [2020-10-11 12:44:50,956 INFO L226 Difference]: Without dead ends: 182 [2020-10-11 12:44:50,956 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:44:50,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-11 12:44:50,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-11 12:44:50,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-11 12:44:50,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-11 12:44:50,958 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-11 12:44:50,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:50,959 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-11 12:44:50,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:50,959 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-11 12:44:50,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:50,959 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:50,959 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:51,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-11 12:44:51,168 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:51,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:51,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-10-11 12:44:51,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:51,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969199849] [2020-10-11 12:44:51,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:51,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969199849] [2020-10-11 12:44:51,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847655235] [2020-10-11 12:44:51,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:51,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:44:51,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:51,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 12:44:51,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:51,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:51,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-10-11 12:44:51,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075955398] [2020-10-11 12:44:51,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 12:44:51,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:51,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 12:44:51,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-11 12:44:51,310 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 12 states. [2020-10-11 12:44:51,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:51,670 INFO L93 Difference]: Finished difference Result 177 states and 419 transitions. [2020-10-11 12:44:51,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:44:51,671 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-10-11 12:44:51,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:51,672 INFO L225 Difference]: With dead ends: 177 [2020-10-11 12:44:51,672 INFO L226 Difference]: Without dead ends: 172 [2020-10-11 12:44:51,673 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:44:51,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-11 12:44:51,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 120. [2020-10-11 12:44:51,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-11 12:44:51,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-11 12:44:51,676 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-11 12:44:51,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:51,676 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-11 12:44:51,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 12:44:51,676 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-11 12:44:51,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:51,677 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:51,677 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:51,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-11 12:44:51,878 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:51,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:51,878 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-10-11 12:44:51,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:51,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211638308] [2020-10-11 12:44:51,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:51,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211638308] [2020-10-11 12:44:51,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314544056] [2020-10-11 12:44:51,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:51,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:51,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:51,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:51,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:52,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:52,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:52,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357226447] [2020-10-11 12:44:52,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:52,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:52,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:52,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:52,066 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-11 12:44:52,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:52,216 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-11 12:44:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:52,217 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:52,218 INFO L225 Difference]: With dead ends: 164 [2020-10-11 12:44:52,218 INFO L226 Difference]: Without dead ends: 162 [2020-10-11 12:44:52,218 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:44:52,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-11 12:44:52,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-11 12:44:52,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-11 12:44:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-11 12:44:52,222 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-11 12:44:52,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:52,222 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-11 12:44:52,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-11 12:44:52,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:52,223 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:52,223 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:52,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-11 12:44:52,433 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:52,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:52,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-10-11 12:44:52,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:52,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138835031] [2020-10-11 12:44:52,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:52,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138835031] [2020-10-11 12:44:52,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050963815] [2020-10-11 12:44:52,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:52,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:52,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:52,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:52,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:52,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:52,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:52,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216842853] [2020-10-11 12:44:52,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:52,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:52,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:52,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:52,661 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-11 12:44:52,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:52,800 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-11 12:44:52,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:44:52,801 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:52,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:52,802 INFO L225 Difference]: With dead ends: 161 [2020-10-11 12:44:52,802 INFO L226 Difference]: Without dead ends: 159 [2020-10-11 12:44:52,803 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:44:52,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-11 12:44:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-11 12:44:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-11 12:44:52,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-11 12:44:52,805 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-11 12:44:52,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:52,806 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-11 12:44:52,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:52,806 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-11 12:44:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:52,806 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:52,806 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:53,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-11 12:44:53,017 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:53,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:53,017 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-10-11 12:44:53,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:53,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653382271] [2020-10-11 12:44:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:53,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653382271] [2020-10-11 12:44:53,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691634126] [2020-10-11 12:44:53,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:53,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:44:53,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:53,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:53,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:53,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:53,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:53,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113174325] [2020-10-11 12:44:53,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:53,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:53,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:53,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:53,214 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-11 12:44:53,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:53,394 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-11 12:44:53,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:44:53,394 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:53,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:53,396 INFO L225 Difference]: With dead ends: 165 [2020-10-11 12:44:53,396 INFO L226 Difference]: Without dead ends: 163 [2020-10-11 12:44:53,396 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:44:53,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-11 12:44:53,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-11 12:44:53,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-11 12:44:53,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-11 12:44:53,398 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-11 12:44:53,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:53,399 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-11 12:44:53,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:53,399 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-11 12:44:53,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:53,399 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:53,399 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:53,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-11 12:44:53,601 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:53,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:53,602 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-10-11 12:44:53,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:53,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123163164] [2020-10-11 12:44:53,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:53,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123163164] [2020-10-11 12:44:53,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011273375] [2020-10-11 12:44:53,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:53,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:53,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:53,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:53,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:53,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121120899] [2020-10-11 12:44:53,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:53,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:53,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:53,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:53,789 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-11 12:44:53,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:53,977 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-11 12:44:53,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:44:53,978 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:53,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:53,979 INFO L225 Difference]: With dead ends: 167 [2020-10-11 12:44:53,979 INFO L226 Difference]: Without dead ends: 165 [2020-10-11 12:44:53,979 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:44:53,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-11 12:44:53,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-11 12:44:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-11 12:44:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-11 12:44:53,983 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-11 12:44:53,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:53,984 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-11 12:44:53,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:53,984 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-11 12:44:53,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:53,984 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:53,984 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:54,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:54,185 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:54,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:54,186 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-10-11 12:44:54,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:54,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141583352] [2020-10-11 12:44:54,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:54,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141583352] [2020-10-11 12:44:54,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984047229] [2020-10-11 12:44:54,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:54,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:54,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:54,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:54,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:54,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:54,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:54,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993338807] [2020-10-11 12:44:54,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:54,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:54,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:54,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:54,364 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-11 12:44:54,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:54,607 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-11 12:44:54,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:44:54,607 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:54,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:54,608 INFO L225 Difference]: With dead ends: 168 [2020-10-11 12:44:54,609 INFO L226 Difference]: Without dead ends: 166 [2020-10-11 12:44:54,609 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:44:54,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-11 12:44:54,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-11 12:44:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-11 12:44:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-11 12:44:54,612 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-11 12:44:54,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:54,612 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-11 12:44:54,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:54,612 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-11 12:44:54,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:54,612 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:54,612 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:54,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:54,813 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:54,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:54,814 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-10-11 12:44:54,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:54,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273848179] [2020-10-11 12:44:54,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:54,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273848179] [2020-10-11 12:44:54,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956047881] [2020-10-11 12:44:54,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:54,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:54,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:54,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:54,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:54,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:54,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:54,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:54,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732285151] [2020-10-11 12:44:54,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:54,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:54,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:54,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:54,979 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-11 12:44:55,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:55,167 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-11 12:44:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:55,168 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:55,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:55,169 INFO L225 Difference]: With dead ends: 160 [2020-10-11 12:44:55,170 INFO L226 Difference]: Without dead ends: 155 [2020-10-11 12:44:55,170 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:44:55,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-11 12:44:55,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-11 12:44:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-11 12:44:55,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-11 12:44:55,173 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-11 12:44:55,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:55,174 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-11 12:44:55,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:55,174 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-11 12:44:55,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:55,174 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:55,175 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:55,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:55,385 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:55,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:55,386 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-10-11 12:44:55,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:55,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861090554] [2020-10-11 12:44:55,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:55,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861090554] [2020-10-11 12:44:55,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676652760] [2020-10-11 12:44:55,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:55,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:55,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:55,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:55,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:55,574 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:55,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:55,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:55,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729690032] [2020-10-11 12:44:55,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:55,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:55,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:55,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:55,603 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-11 12:44:55,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:55,917 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-11 12:44:55,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:44:55,918 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:55,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:55,919 INFO L225 Difference]: With dead ends: 189 [2020-10-11 12:44:55,919 INFO L226 Difference]: Without dead ends: 181 [2020-10-11 12:44:55,920 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:44:55,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-11 12:44:55,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-11 12:44:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-11 12:44:55,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-11 12:44:55,923 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-11 12:44:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:55,923 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-11 12:44:55,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:55,923 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-11 12:44:55,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:55,924 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:55,924 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:56,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:56,133 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:56,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:56,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-10-11 12:44:56,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:56,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913904504] [2020-10-11 12:44:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:56,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913904504] [2020-10-11 12:44:56,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985065797] [2020-10-11 12:44:56,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:56,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:56,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:56,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:56,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:56,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:56,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:56,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089059401] [2020-10-11 12:44:56,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:56,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:56,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:56,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:56,310 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-11 12:44:56,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:56,540 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-11 12:44:56,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:44:56,540 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:56,542 INFO L225 Difference]: With dead ends: 169 [2020-10-11 12:44:56,542 INFO L226 Difference]: Without dead ends: 167 [2020-10-11 12:44:56,542 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:44:56,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-11 12:44:56,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-11 12:44:56,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-11 12:44:56,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-11 12:44:56,545 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-11 12:44:56,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:56,545 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-11 12:44:56,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:56,545 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-11 12:44:56,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:56,546 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:56,546 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:56,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-11 12:44:56,756 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:56,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:56,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-10-11 12:44:56,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:56,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040264001] [2020-10-11 12:44:56,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:56,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040264001] [2020-10-11 12:44:56,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139576240] [2020-10-11 12:44:56,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:56,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:56,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:56,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:56,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:56,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:56,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:56,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:56,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633808236] [2020-10-11 12:44:56,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:56,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:56,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:56,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:56,924 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-11 12:44:57,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:57,239 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-11 12:44:57,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:44:57,240 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:57,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:57,241 INFO L225 Difference]: With dead ends: 192 [2020-10-11 12:44:57,241 INFO L226 Difference]: Without dead ends: 184 [2020-10-11 12:44:57,242 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:44:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-11 12:44:57,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-11 12:44:57,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-11 12:44:57,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-11 12:44:57,244 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-11 12:44:57,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:57,244 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-11 12:44:57,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:57,245 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-11 12:44:57,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:57,245 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:57,245 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:57,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:57,446 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:57,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:57,446 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-10-11 12:44:57,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:57,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864835742] [2020-10-11 12:44:57,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:57,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864835742] [2020-10-11 12:44:57,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540252965] [2020-10-11 12:44:57,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:57,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:57,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:57,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:57,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:57,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:57,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783726193] [2020-10-11 12:44:57,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:57,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:57,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:57,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:57,616 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-11 12:44:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:57,920 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-11 12:44:57,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:44:57,921 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:57,922 INFO L225 Difference]: With dead ends: 180 [2020-10-11 12:44:57,922 INFO L226 Difference]: Without dead ends: 175 [2020-10-11 12:44:57,923 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:44:57,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-11 12:44:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-11 12:44:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-11 12:44:57,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-11 12:44:57,926 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-11 12:44:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:57,926 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-11 12:44:57,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:57,926 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-11 12:44:57,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:57,926 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:57,927 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:58,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-11 12:44:58,130 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:58,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:58,131 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-10-11 12:44:58,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:58,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479928329] [2020-10-11 12:44:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:58,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479928329] [2020-10-11 12:44:58,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007310288] [2020-10-11 12:44:58,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:58,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:44:58,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:58,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:44:58,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:58,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:58,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:58,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-11 12:44:58,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839304371] [2020-10-11 12:44:58,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 12:44:58,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:58,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 12:44:58,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:44:58,377 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-11 12:44:58,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:58,516 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-11 12:44:58,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:44:58,517 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-11 12:44:58,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:58,518 INFO L225 Difference]: With dead ends: 164 [2020-10-11 12:44:58,518 INFO L226 Difference]: Without dead ends: 159 [2020-10-11 12:44:58,518 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-11 12:44:58,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-11 12:44:58,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-11 12:44:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-11 12:44:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-11 12:44:58,521 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-11 12:44:58,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:58,521 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-11 12:44:58,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 12:44:58,522 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-11 12:44:58,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:58,522 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:58,522 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:58,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:58,724 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:58,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:58,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-10-11 12:44:58,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:58,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645821551] [2020-10-11 12:44:58,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:58,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645821551] [2020-10-11 12:44:58,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349609840] [2020-10-11 12:44:58,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:58,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:44:58,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:58,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:44:58,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:58,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:58,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:44:58,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337642852] [2020-10-11 12:44:58,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:44:58,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:58,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:44:58,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:44:58,977 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-11 12:44:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:59,028 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-11 12:44:59,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:59,029 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-11 12:44:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:59,030 INFO L225 Difference]: With dead ends: 156 [2020-10-11 12:44:59,030 INFO L226 Difference]: Without dead ends: 153 [2020-10-11 12:44:59,031 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:44:59,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-11 12:44:59,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-11 12:44:59,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-11 12:44:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-11 12:44:59,033 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-11 12:44:59,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:59,034 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-11 12:44:59,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:44:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-11 12:44:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:59,034 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:59,035 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:59,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-11 12:44:59,244 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:59,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:59,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-10-11 12:44:59,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:59,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298818471] [2020-10-11 12:44:59,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:59,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298818471] [2020-10-11 12:44:59,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747803344] [2020-10-11 12:44:59,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:59,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:59,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:59,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:44:59,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:59,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:59,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:44:59,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473944929] [2020-10-11 12:44:59,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:44:59,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:59,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:44:59,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:44:59,500 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-11 12:44:59,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:59,559 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-11 12:44:59,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:59,559 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-11 12:44:59,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:59,561 INFO L225 Difference]: With dead ends: 170 [2020-10-11 12:44:59,561 INFO L226 Difference]: Without dead ends: 167 [2020-10-11 12:44:59,561 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:44:59,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-11 12:44:59,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-11 12:44:59,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-11 12:44:59,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-11 12:44:59,564 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-11 12:44:59,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:59,564 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-11 12:44:59,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:44:59,564 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-11 12:44:59,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:59,565 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:59,565 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:59,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:59,766 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:59,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:59,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-10-11 12:44:59,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:59,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493861175] [2020-10-11 12:44:59,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:59,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493861175] [2020-10-11 12:44:59,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614260385] [2020-10-11 12:44:59,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:59,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:44:59,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:59,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:44:59,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:59,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:59,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:44:59,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869563897] [2020-10-11 12:44:59,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:44:59,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:59,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:44:59,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:44:59,996 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-11 12:45:00,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:00,077 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-11 12:45:00,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:45:00,078 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-11 12:45:00,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:00,079 INFO L225 Difference]: With dead ends: 169 [2020-10-11 12:45:00,079 INFO L226 Difference]: Without dead ends: 166 [2020-10-11 12:45:00,080 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:45:00,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-11 12:45:00,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-11 12:45:00,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-11 12:45:00,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-11 12:45:00,082 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-11 12:45:00,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:00,082 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-11 12:45:00,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:00,082 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-11 12:45:00,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:45:00,083 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:00,083 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:00,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:00,288 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:00,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:00,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-10-11 12:45:00,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:00,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11950719] [2020-10-11 12:45:00,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:00,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11950719] [2020-10-11 12:45:00,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466121410] [2020-10-11 12:45:00,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:00,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:45:00,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:00,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:00,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:00,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:00,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:00,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294194683] [2020-10-11 12:45:00,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:00,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:00,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:00,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:00,522 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-11 12:45:00,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:00,620 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-11 12:45:00,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:45:00,621 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-11 12:45:00,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:00,622 INFO L225 Difference]: With dead ends: 168 [2020-10-11 12:45:00,622 INFO L226 Difference]: Without dead ends: 165 [2020-10-11 12:45:00,623 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:45:00,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-11 12:45:00,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-11 12:45:00,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-11 12:45:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-11 12:45:00,626 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-11 12:45:00,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:00,627 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-11 12:45:00,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:00,627 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-11 12:45:00,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:45:00,627 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:00,627 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:00,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-11 12:45:00,839 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:00,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:00,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-10-11 12:45:00,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:00,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505897101] [2020-10-11 12:45:00,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:00,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505897101] [2020-10-11 12:45:00,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389241581] [2020-10-11 12:45:00,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:00,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:00,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:01,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:01,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:01,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815214753] [2020-10-11 12:45:01,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:01,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:01,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:01,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:01,061 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-11 12:45:01,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:01,186 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-11 12:45:01,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:01,187 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-11 12:45:01,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:01,188 INFO L225 Difference]: With dead ends: 167 [2020-10-11 12:45:01,188 INFO L226 Difference]: Without dead ends: 164 [2020-10-11 12:45:01,189 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:45:01,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-11 12:45:01,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-11 12:45:01,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-11 12:45:01,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-11 12:45:01,192 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-11 12:45:01,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:01,193 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-11 12:45:01,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:01,193 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-11 12:45:01,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:45:01,193 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:01,193 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:01,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:01,394 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:01,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:01,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-10-11 12:45:01,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:01,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525303911] [2020-10-11 12:45:01,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:01,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525303911] [2020-10-11 12:45:01,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081810049] [2020-10-11 12:45:01,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:01,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:01,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:01,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:01,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:01,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:01,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:01,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:01,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479321712] [2020-10-11 12:45:01,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:01,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:01,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:01,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:01,627 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-11 12:45:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:01,808 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-11 12:45:01,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:01,809 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-11 12:45:01,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:01,810 INFO L225 Difference]: With dead ends: 176 [2020-10-11 12:45:01,810 INFO L226 Difference]: Without dead ends: 170 [2020-10-11 12:45:01,811 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:01,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-11 12:45:01,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-11 12:45:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-11 12:45:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-11 12:45:01,813 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-11 12:45:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:01,813 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-11 12:45:01,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-11 12:45:01,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:01,814 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:01,814 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:02,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:02,015 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:02,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:02,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-10-11 12:45:02,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:02,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669582697] [2020-10-11 12:45:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:02,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669582697] [2020-10-11 12:45:02,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979947064] [2020-10-11 12:45:02,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:02,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:02,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:02,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:02,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:02,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:02,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:02,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950811555] [2020-10-11 12:45:02,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:02,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:02,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:02,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:02,253 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-11 12:45:02,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:02,295 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-11 12:45:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:45:02,296 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:02,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:02,297 INFO L225 Difference]: With dead ends: 163 [2020-10-11 12:45:02,297 INFO L226 Difference]: Without dead ends: 161 [2020-10-11 12:45:02,297 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:02,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-11 12:45:02,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-11 12:45:02,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-11 12:45:02,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-11 12:45:02,300 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-11 12:45:02,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:02,300 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-11 12:45:02,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:02,301 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-11 12:45:02,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:02,301 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:02,301 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:02,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-11 12:45:02,509 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:02,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:02,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-10-11 12:45:02,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:02,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006267785] [2020-10-11 12:45:02,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:02,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006267785] [2020-10-11 12:45:02,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981287970] [2020-10-11 12:45:02,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:02,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:45:02,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:02,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:02,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:02,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:02,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:02,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592516820] [2020-10-11 12:45:02,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:02,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:02,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:02,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:02,847 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-11 12:45:03,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:03,038 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-11 12:45:03,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:45:03,039 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:03,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:03,040 INFO L225 Difference]: With dead ends: 172 [2020-10-11 12:45:03,040 INFO L226 Difference]: Without dead ends: 170 [2020-10-11 12:45:03,041 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:45:03,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-11 12:45:03,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-11 12:45:03,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-11 12:45:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-11 12:45:03,046 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-11 12:45:03,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:03,046 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-11 12:45:03,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:03,046 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-11 12:45:03,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:03,047 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:03,047 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:03,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:03,258 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:03,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:03,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-10-11 12:45:03,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:03,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012688265] [2020-10-11 12:45:03,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:03,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012688265] [2020-10-11 12:45:03,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935289811] [2020-10-11 12:45:03,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:03,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:03,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:03,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:03,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:03,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:03,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:03,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118212964] [2020-10-11 12:45:03,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:03,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:03,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:03,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:03,571 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-11 12:45:03,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:03,759 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-11 12:45:03,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:45:03,759 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:03,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:03,761 INFO L225 Difference]: With dead ends: 179 [2020-10-11 12:45:03,761 INFO L226 Difference]: Without dead ends: 177 [2020-10-11 12:45:03,761 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:45:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-11 12:45:03,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-11 12:45:03,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-11 12:45:03,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-11 12:45:03,765 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-11 12:45:03,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:03,766 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-11 12:45:03,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:03,766 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-11 12:45:03,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:03,766 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:03,766 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:03,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-11 12:45:03,975 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:03,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:03,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-10-11 12:45:03,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:03,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829325969] [2020-10-11 12:45:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:04,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829325969] [2020-10-11 12:45:04,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291407203] [2020-10-11 12:45:04,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:04,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:04,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:04,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:04,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:04,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:04,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:04,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330363373] [2020-10-11 12:45:04,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:04,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:04,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:04,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:04,195 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-11 12:45:04,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:04,370 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-11 12:45:04,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:45:04,370 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:04,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:04,372 INFO L225 Difference]: With dead ends: 179 [2020-10-11 12:45:04,372 INFO L226 Difference]: Without dead ends: 177 [2020-10-11 12:45:04,372 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:04,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-11 12:45:04,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-11 12:45:04,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-11 12:45:04,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-11 12:45:04,376 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-11 12:45:04,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:04,376 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-11 12:45:04,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:04,376 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-11 12:45:04,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:04,377 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:04,377 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:04,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-11 12:45:04,587 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:04,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:04,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-10-11 12:45:04,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:04,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674923688] [2020-10-11 12:45:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:04,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674923688] [2020-10-11 12:45:04,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168263778] [2020-10-11 12:45:04,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:04,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:04,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:04,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:04,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:04,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:04,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:04,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534705472] [2020-10-11 12:45:04,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:04,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:04,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:04,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:04,801 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-11 12:45:04,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:04,997 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-11 12:45:04,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:04,998 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:04,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:04,999 INFO L225 Difference]: With dead ends: 184 [2020-10-11 12:45:05,000 INFO L226 Difference]: Without dead ends: 182 [2020-10-11 12:45:05,000 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:05,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-11 12:45:05,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-11 12:45:05,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-11 12:45:05,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-11 12:45:05,003 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-11 12:45:05,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:05,003 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-11 12:45:05,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:05,003 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-11 12:45:05,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:05,004 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:05,004 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:05,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-11 12:45:05,213 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:05,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:05,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-10-11 12:45:05,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:05,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550459812] [2020-10-11 12:45:05,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:05,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550459812] [2020-10-11 12:45:05,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989335004] [2020-10-11 12:45:05,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:05,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:05,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:05,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:05,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:05,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102405268] [2020-10-11 12:45:05,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:05,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:05,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:05,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:05,440 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-11 12:45:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:05,634 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-11 12:45:05,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:05,635 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:05,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:05,636 INFO L225 Difference]: With dead ends: 179 [2020-10-11 12:45:05,636 INFO L226 Difference]: Without dead ends: 177 [2020-10-11 12:45:05,637 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:05,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-11 12:45:05,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-11 12:45:05,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-11 12:45:05,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-11 12:45:05,640 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-11 12:45:05,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:05,640 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-11 12:45:05,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:05,640 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-11 12:45:05,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:05,641 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:05,641 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:05,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:05,848 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:05,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-10-11 12:45:05,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:05,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349973700] [2020-10-11 12:45:05,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:05,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349973700] [2020-10-11 12:45:05,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259153908] [2020-10-11 12:45:05,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:05,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:05,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:05,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:05,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:06,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:06,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:06,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130436376] [2020-10-11 12:45:06,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:06,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:06,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:06,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:06,101 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-11 12:45:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:06,240 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-11 12:45:06,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:45:06,240 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:06,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:06,242 INFO L225 Difference]: With dead ends: 176 [2020-10-11 12:45:06,242 INFO L226 Difference]: Without dead ends: 174 [2020-10-11 12:45:06,242 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:45:06,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-11 12:45:06,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-11 12:45:06,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-11 12:45:06,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-11 12:45:06,244 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-11 12:45:06,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:06,245 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-11 12:45:06,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:06,245 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-11 12:45:06,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:06,245 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:06,245 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:06,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:06,446 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:06,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:06,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-10-11 12:45:06,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:06,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703616320] [2020-10-11 12:45:06,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:06,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703616320] [2020-10-11 12:45:06,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827168623] [2020-10-11 12:45:06,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:06,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:45:06,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:06,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:06,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:06,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:06,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:06,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37973562] [2020-10-11 12:45:06,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:06,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:06,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:06,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:06,694 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-11 12:45:06,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:06,920 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-11 12:45:06,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:06,921 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:06,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:06,922 INFO L225 Difference]: With dead ends: 185 [2020-10-11 12:45:06,922 INFO L226 Difference]: Without dead ends: 183 [2020-10-11 12:45:06,922 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:06,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-11 12:45:06,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-11 12:45:06,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-11 12:45:06,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-11 12:45:06,925 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-11 12:45:06,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:06,926 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-11 12:45:06,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:06,926 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-11 12:45:06,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:06,926 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:06,927 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:07,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:07,127 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:07,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:07,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-10-11 12:45:07,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:07,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739029662] [2020-10-11 12:45:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:07,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739029662] [2020-10-11 12:45:07,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5429652] [2020-10-11 12:45:07,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:07,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:07,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:07,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:07,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:07,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:07,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:07,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799269954] [2020-10-11 12:45:07,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:07,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:07,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:07,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:07,365 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-11 12:45:07,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:07,559 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-11 12:45:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:07,560 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:07,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:07,561 INFO L225 Difference]: With dead ends: 185 [2020-10-11 12:45:07,561 INFO L226 Difference]: Without dead ends: 183 [2020-10-11 12:45:07,562 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:07,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-11 12:45:07,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-11 12:45:07,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-11 12:45:07,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-11 12:45:07,566 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-11 12:45:07,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:07,566 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-11 12:45:07,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:07,566 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-11 12:45:07,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:07,566 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:07,566 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:07,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:07,767 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:07,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:07,768 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-10-11 12:45:07,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:07,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942770081] [2020-10-11 12:45:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:07,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942770081] [2020-10-11 12:45:07,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105974511] [2020-10-11 12:45:07,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:07,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:07,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:07,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:07,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:08,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:08,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:08,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82859118] [2020-10-11 12:45:08,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:08,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:08,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:08,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:08,032 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-11 12:45:08,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:08,093 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-11 12:45:08,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:45:08,094 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:08,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:08,095 INFO L225 Difference]: With dead ends: 182 [2020-10-11 12:45:08,096 INFO L226 Difference]: Without dead ends: 180 [2020-10-11 12:45:08,096 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:45:08,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-11 12:45:08,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-11 12:45:08,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-11 12:45:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-11 12:45:08,100 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-11 12:45:08,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:08,100 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-11 12:45:08,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-11 12:45:08,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:08,101 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:08,101 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:08,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-11 12:45:08,305 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:08,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:08,307 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-10-11 12:45:08,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:08,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069187426] [2020-10-11 12:45:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:08,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:08,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069187426] [2020-10-11 12:45:08,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406219390] [2020-10-11 12:45:08,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:08,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:08,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:08,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:08,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:08,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:08,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:08,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269440069] [2020-10-11 12:45:08,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:08,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:08,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:08,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:08,563 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-11 12:45:08,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:08,729 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-11 12:45:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:45:08,729 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:08,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:08,731 INFO L225 Difference]: With dead ends: 185 [2020-10-11 12:45:08,731 INFO L226 Difference]: Without dead ends: 183 [2020-10-11 12:45:08,731 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:45:08,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-11 12:45:08,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-11 12:45:08,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:08,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-11 12:45:08,734 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-11 12:45:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:08,734 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-11 12:45:08,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:08,735 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-11 12:45:08,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:08,735 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:08,735 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:08,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:08,936 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:08,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:08,937 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-10-11 12:45:08,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:08,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074309999] [2020-10-11 12:45:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:09,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074309999] [2020-10-11 12:45:09,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450791464] [2020-10-11 12:45:09,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:09,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:09,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:09,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:09,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:09,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:09,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177129654] [2020-10-11 12:45:09,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:09,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:09,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:09,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:09,198 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-11 12:45:09,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:09,401 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-11 12:45:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:45:09,402 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:09,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:09,403 INFO L225 Difference]: With dead ends: 191 [2020-10-11 12:45:09,404 INFO L226 Difference]: Without dead ends: 189 [2020-10-11 12:45:09,404 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:09,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-11 12:45:09,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-11 12:45:09,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-11 12:45:09,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-11 12:45:09,407 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-11 12:45:09,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:09,408 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-11 12:45:09,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:09,408 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-11 12:45:09,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:09,408 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:09,408 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:09,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:09,611 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:09,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:09,611 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-10-11 12:45:09,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:09,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458367081] [2020-10-11 12:45:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:09,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458367081] [2020-10-11 12:45:09,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80725728] [2020-10-11 12:45:09,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:09,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:09,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:09,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:09,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:09,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:09,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:09,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050507138] [2020-10-11 12:45:09,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:09,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:09,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:09,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:09,839 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-11 12:45:10,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:10,064 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-11 12:45:10,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:10,064 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:10,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:10,066 INFO L225 Difference]: With dead ends: 187 [2020-10-11 12:45:10,066 INFO L226 Difference]: Without dead ends: 185 [2020-10-11 12:45:10,066 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:10,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-11 12:45:10,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-11 12:45:10,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:10,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-11 12:45:10,070 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-11 12:45:10,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:10,071 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-11 12:45:10,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:10,071 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-11 12:45:10,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:10,071 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:10,072 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:10,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-11 12:45:10,272 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:10,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:10,273 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-10-11 12:45:10,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:10,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26798178] [2020-10-11 12:45:10,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:10,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26798178] [2020-10-11 12:45:10,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93471535] [2020-10-11 12:45:10,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:10,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:45:10,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:10,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:10,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:10,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:10,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:10,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799631619] [2020-10-11 12:45:10,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:10,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:10,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:10,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:10,483 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-11 12:45:10,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:10,727 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-11 12:45:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:10,728 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:10,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:10,730 INFO L225 Difference]: With dead ends: 198 [2020-10-11 12:45:10,730 INFO L226 Difference]: Without dead ends: 196 [2020-10-11 12:45:10,730 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:10,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-11 12:45:10,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-11 12:45:10,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:10,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-11 12:45:10,734 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-11 12:45:10,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:10,734 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-11 12:45:10,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:10,734 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-11 12:45:10,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:10,734 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:10,735 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:10,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:10,935 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:10,936 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-10-11 12:45:10,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:10,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002742728] [2020-10-11 12:45:10,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:11,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002742728] [2020-10-11 12:45:11,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557517272] [2020-10-11 12:45:11,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:11,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:11,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:11,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:11,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:11,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:11,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:11,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218003206] [2020-10-11 12:45:11,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:11,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:11,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:11,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:11,223 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-11 12:45:11,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:11,492 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-11 12:45:11,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:11,492 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:11,494 INFO L225 Difference]: With dead ends: 189 [2020-10-11 12:45:11,494 INFO L226 Difference]: Without dead ends: 187 [2020-10-11 12:45:11,494 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:11,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-11 12:45:11,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-11 12:45:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-11 12:45:11,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-11 12:45:11,497 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-11 12:45:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:11,497 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-11 12:45:11,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:11,497 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-11 12:45:11,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:11,498 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:11,498 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:11,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-11 12:45:11,699 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:11,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:11,699 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-10-11 12:45:11,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:11,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152562982] [2020-10-11 12:45:11,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:11,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152562982] [2020-10-11 12:45:11,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233182483] [2020-10-11 12:45:11,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:11,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:11,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:11,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:11,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:11,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:11,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:11,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713866065] [2020-10-11 12:45:11,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:11,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:11,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:11,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:11,962 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-11 12:45:12,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:12,050 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-11 12:45:12,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:45:12,051 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:12,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:12,052 INFO L225 Difference]: With dead ends: 178 [2020-10-11 12:45:12,052 INFO L226 Difference]: Without dead ends: 176 [2020-10-11 12:45:12,053 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:45:12,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-11 12:45:12,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-11 12:45:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-11 12:45:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-11 12:45:12,056 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-11 12:45:12,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:12,056 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-11 12:45:12,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-11 12:45:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:12,056 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:12,056 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:12,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:12,257 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:12,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:12,258 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-10-11 12:45:12,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:12,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43886819] [2020-10-11 12:45:12,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:12,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43886819] [2020-10-11 12:45:12,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069746110] [2020-10-11 12:45:12,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:12,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:12,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:12,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:12,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:12,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:12,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:12,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811381303] [2020-10-11 12:45:12,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:12,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:12,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:12,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:12,501 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-11 12:45:12,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:12,681 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-11 12:45:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:12,681 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:12,683 INFO L225 Difference]: With dead ends: 193 [2020-10-11 12:45:12,683 INFO L226 Difference]: Without dead ends: 191 [2020-10-11 12:45:12,683 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:12,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-11 12:45:12,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-11 12:45:12,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-11 12:45:12,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-11 12:45:12,686 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-11 12:45:12,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:12,686 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-11 12:45:12,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:12,686 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-11 12:45:12,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:12,687 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:12,687 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:12,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-11 12:45:12,887 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:12,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:12,888 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-10-11 12:45:12,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:12,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66736950] [2020-10-11 12:45:12,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:12,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66736950] [2020-10-11 12:45:12,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782020225] [2020-10-11 12:45:12,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:13,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:13,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:13,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:13,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:13,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128585824] [2020-10-11 12:45:13,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:13,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:13,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:13,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:13,152 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-11 12:45:13,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:13,396 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-11 12:45:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:13,397 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:13,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:13,398 INFO L225 Difference]: With dead ends: 195 [2020-10-11 12:45:13,399 INFO L226 Difference]: Without dead ends: 193 [2020-10-11 12:45:13,399 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-11 12:45:13,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-11 12:45:13,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-11 12:45:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-11 12:45:13,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-11 12:45:13,403 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-11 12:45:13,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:13,403 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-11 12:45:13,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:13,403 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-11 12:45:13,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:13,403 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:13,404 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:13,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:13,609 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:13,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:13,609 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-10-11 12:45:13,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:13,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702222409] [2020-10-11 12:45:13,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:13,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702222409] [2020-10-11 12:45:13,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671478046] [2020-10-11 12:45:13,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:13,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:13,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:13,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:13,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:13,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:13,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:13,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385386] [2020-10-11 12:45:13,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:13,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:13,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:13,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:13,879 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-11 12:45:13,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:13,994 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-11 12:45:13,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:45:13,995 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:13,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:13,997 INFO L225 Difference]: With dead ends: 174 [2020-10-11 12:45:13,997 INFO L226 Difference]: Without dead ends: 172 [2020-10-11 12:45:13,997 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:45:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-11 12:45:13,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-11 12:45:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:14,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-11 12:45:14,000 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-11 12:45:14,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:14,000 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-11 12:45:14,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:14,000 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-11 12:45:14,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:14,001 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:14,001 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:14,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-11 12:45:14,201 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:14,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:14,202 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-10-11 12:45:14,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:14,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15616280] [2020-10-11 12:45:14,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:14,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15616280] [2020-10-11 12:45:14,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122453738] [2020-10-11 12:45:14,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:14,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:45:14,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:14,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:14,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:14,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:14,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:14,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096422772] [2020-10-11 12:45:14,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:14,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:14,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:14,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:14,438 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-11 12:45:14,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:14,674 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-11 12:45:14,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:14,675 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:14,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:14,676 INFO L225 Difference]: With dead ends: 189 [2020-10-11 12:45:14,676 INFO L226 Difference]: Without dead ends: 187 [2020-10-11 12:45:14,676 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-11 12:45:14,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-11 12:45:14,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-11 12:45:14,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-11 12:45:14,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-11 12:45:14,679 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-11 12:45:14,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:14,680 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-11 12:45:14,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:14,680 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-11 12:45:14,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:14,680 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:14,680 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:14,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:14,881 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:14,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:14,882 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-10-11 12:45:14,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:14,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119490918] [2020-10-11 12:45:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:14,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119490918] [2020-10-11 12:45:14,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127367552] [2020-10-11 12:45:14,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:14,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:14,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:14,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:14,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:15,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:15,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:15,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033177287] [2020-10-11 12:45:15,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:15,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:15,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:15,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:15,121 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-11 12:45:15,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:15,256 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-11 12:45:15,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:15,257 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:15,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:15,258 INFO L225 Difference]: With dead ends: 175 [2020-10-11 12:45:15,259 INFO L226 Difference]: Without dead ends: 173 [2020-10-11 12:45:15,259 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:45:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-11 12:45:15,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-11 12:45:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-11 12:45:15,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-11 12:45:15,262 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-11 12:45:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:15,262 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-11 12:45:15,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:15,262 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-11 12:45:15,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:15,263 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:15,263 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:15,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:15,464 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:15,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:15,465 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-10-11 12:45:15,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:15,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131065331] [2020-10-11 12:45:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:15,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:15,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131065331] [2020-10-11 12:45:15,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41626111] [2020-10-11 12:45:15,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:15,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:15,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:15,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:15,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:15,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:15,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:15,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:15,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532569485] [2020-10-11 12:45:15,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:15,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:15,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:15,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:15,711 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-11 12:45:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:16,024 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-11 12:45:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:16,025 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:16,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:16,026 INFO L225 Difference]: With dead ends: 195 [2020-10-11 12:45:16,026 INFO L226 Difference]: Without dead ends: 190 [2020-10-11 12:45:16,026 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:45:16,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-11 12:45:16,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-11 12:45:16,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-11 12:45:16,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-11 12:45:16,030 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-11 12:45:16,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:16,030 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-11 12:45:16,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-11 12:45:16,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:16,031 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:16,031 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:16,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:16,241 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:16,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:16,242 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-10-11 12:45:16,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:16,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344092844] [2020-10-11 12:45:16,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:16,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344092844] [2020-10-11 12:45:16,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410413443] [2020-10-11 12:45:16,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:16,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:16,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:16,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:16,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:16,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:16,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:16,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415056995] [2020-10-11 12:45:16,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:16,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:16,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:16,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:16,480 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-11 12:45:16,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:16,718 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-11 12:45:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:45:16,718 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:16,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:16,720 INFO L225 Difference]: With dead ends: 187 [2020-10-11 12:45:16,720 INFO L226 Difference]: Without dead ends: 185 [2020-10-11 12:45:16,720 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:16,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-11 12:45:16,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-11 12:45:16,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-11 12:45:16,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-11 12:45:16,723 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-11 12:45:16,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:16,723 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-11 12:45:16,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:16,723 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-11 12:45:16,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:16,724 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:16,724 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:16,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:16,924 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:16,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:16,925 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-10-11 12:45:16,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:16,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86389347] [2020-10-11 12:45:16,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:16,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86389347] [2020-10-11 12:45:16,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700933848] [2020-10-11 12:45:16,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:17,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:17,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:17,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:17,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:17,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:17,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619574273] [2020-10-11 12:45:17,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:17,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:17,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:17,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:17,161 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-11 12:45:17,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:17,571 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-11 12:45:17,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:45:17,572 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:17,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:17,574 INFO L225 Difference]: With dead ends: 212 [2020-10-11 12:45:17,574 INFO L226 Difference]: Without dead ends: 207 [2020-10-11 12:45:17,574 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:45:17,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-11 12:45:17,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-11 12:45:17,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-11 12:45:17,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-11 12:45:17,578 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-11 12:45:17,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:17,578 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-11 12:45:17,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:17,578 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-11 12:45:17,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:17,579 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:17,579 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:17,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-11 12:45:17,779 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:17,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:17,780 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-10-11 12:45:17,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:17,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089913262] [2020-10-11 12:45:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:17,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089913262] [2020-10-11 12:45:17,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593725579] [2020-10-11 12:45:17,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:17,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:17,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:17,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:17,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:17,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:18,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:18,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:18,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933130804] [2020-10-11 12:45:18,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:18,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:18,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:18,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:18,008 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-11 12:45:18,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:18,303 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-11 12:45:18,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:18,304 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:18,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:18,305 INFO L225 Difference]: With dead ends: 202 [2020-10-11 12:45:18,306 INFO L226 Difference]: Without dead ends: 197 [2020-10-11 12:45:18,306 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:45:18,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-11 12:45:18,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-11 12:45:18,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-11 12:45:18,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-11 12:45:18,309 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-11 12:45:18,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:18,309 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-11 12:45:18,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:18,309 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-11 12:45:18,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:18,309 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:18,309 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:18,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:18,510 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:18,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:18,511 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-10-11 12:45:18,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:18,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360880570] [2020-10-11 12:45:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:18,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360880570] [2020-10-11 12:45:18,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023890605] [2020-10-11 12:45:18,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:18,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:45:18,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:18,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:18,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:19,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:19,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:19,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138315221] [2020-10-11 12:45:19,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:19,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:19,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:19,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:19,279 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-11 12:45:19,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:19,554 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-11 12:45:19,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:19,555 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:19,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:19,557 INFO L225 Difference]: With dead ends: 198 [2020-10-11 12:45:19,557 INFO L226 Difference]: Without dead ends: 196 [2020-10-11 12:45:19,557 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:19,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-11 12:45:19,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-11 12:45:19,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-11 12:45:19,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-11 12:45:19,561 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-11 12:45:19,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:19,561 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-11 12:45:19,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:19,562 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-11 12:45:19,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:19,562 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:19,562 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:19,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-11 12:45:19,765 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:19,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:19,765 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-10-11 12:45:19,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:19,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945821576] [2020-10-11 12:45:19,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:19,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945821576] [2020-10-11 12:45:19,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790937212] [2020-10-11 12:45:19,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:19,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:19,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:19,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:19,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:20,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:20,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:20,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869565511] [2020-10-11 12:45:20,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:20,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:20,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:20,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:20,031 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-11 12:45:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:20,410 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-11 12:45:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:45:20,410 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:20,411 INFO L225 Difference]: With dead ends: 209 [2020-10-11 12:45:20,411 INFO L226 Difference]: Without dead ends: 207 [2020-10-11 12:45:20,411 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:45:20,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-11 12:45:20,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-11 12:45:20,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-11 12:45:20,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-11 12:45:20,414 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-11 12:45:20,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:20,414 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-11 12:45:20,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:20,415 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-11 12:45:20,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:20,415 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:20,415 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:20,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-11 12:45:20,616 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:20,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:20,616 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-10-11 12:45:20,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:20,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802765445] [2020-10-11 12:45:20,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:20,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802765445] [2020-10-11 12:45:20,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184174962] [2020-10-11 12:45:20,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:20,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:20,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:20,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:20,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:20,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:20,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:20,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:20,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860403010] [2020-10-11 12:45:20,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:20,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:20,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:20,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:20,911 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-11 12:45:21,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:21,424 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-11 12:45:21,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:45:21,425 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:21,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:21,426 INFO L225 Difference]: With dead ends: 217 [2020-10-11 12:45:21,427 INFO L226 Difference]: Without dead ends: 212 [2020-10-11 12:45:21,427 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:45:21,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-11 12:45:21,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-11 12:45:21,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-11 12:45:21,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-11 12:45:21,431 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-11 12:45:21,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:21,431 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-11 12:45:21,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:21,431 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-11 12:45:21,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:21,432 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:21,432 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:21,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-11 12:45:21,642 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:21,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:21,642 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-10-11 12:45:21,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:21,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631316824] [2020-10-11 12:45:21,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:21,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631316824] [2020-10-11 12:45:21,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472677790] [2020-10-11 12:45:21,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:21,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:21,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:21,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:21,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:23,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:23,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:23,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:23,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132631206] [2020-10-11 12:45:23,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:23,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:23,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:23,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-11 12:45:23,953 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-11 12:45:28,242 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-11 12:45:32,463 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-11 12:45:33,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:33,350 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-11 12:45:33,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:45:33,351 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:33,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:33,353 INFO L225 Difference]: With dead ends: 236 [2020-10-11 12:45:33,353 INFO L226 Difference]: Without dead ends: 228 [2020-10-11 12:45:33,353 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-11 12:45:33,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-11 12:45:33,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-11 12:45:33,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-11 12:45:33,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-11 12:45:33,356 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-11 12:45:33,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:33,356 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-11 12:45:33,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:33,357 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-11 12:45:33,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:33,357 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:33,357 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:33,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-11 12:45:33,558 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:33,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:33,558 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-10-11 12:45:33,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:33,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850071423] [2020-10-11 12:45:33,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:33,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850071423] [2020-10-11 12:45:33,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399756618] [2020-10-11 12:45:33,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:33,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:33,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:33,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:33,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:33,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:33,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:33,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782210707] [2020-10-11 12:45:33,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:33,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:33,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:33,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:33,853 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-10-11 12:45:34,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:34,366 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-10-11 12:45:34,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:45:34,366 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:34,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:34,368 INFO L225 Difference]: With dead ends: 219 [2020-10-11 12:45:34,368 INFO L226 Difference]: Without dead ends: 214 [2020-10-11 12:45:34,368 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:45:34,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-11 12:45:34,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-10-11 12:45:34,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-11 12:45:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-11 12:45:34,371 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-11 12:45:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:34,371 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-11 12:45:34,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:34,371 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-11 12:45:34,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:34,372 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:34,372 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:34,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:34,574 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:34,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:34,574 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-10-11 12:45:34,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:34,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121257603] [2020-10-11 12:45:34,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:34,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:34,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121257603] [2020-10-11 12:45:34,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316571441] [2020-10-11 12:45:34,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:34,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:34,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:34,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:34,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:34,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:34,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:34,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073255251] [2020-10-11 12:45:34,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:34,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:34,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:34,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:34,805 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-11 12:45:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:35,058 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-11 12:45:35,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:35,059 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:35,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:35,060 INFO L225 Difference]: With dead ends: 197 [2020-10-11 12:45:35,060 INFO L226 Difference]: Without dead ends: 195 [2020-10-11 12:45:35,060 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:35,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-11 12:45:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-11 12:45:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-11 12:45:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-11 12:45:35,063 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-11 12:45:35,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:35,064 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-11 12:45:35,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:35,064 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-11 12:45:35,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:35,065 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:35,065 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:35,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:35,265 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:35,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:35,265 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-10-11 12:45:35,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:35,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468837883] [2020-10-11 12:45:35,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:35,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468837883] [2020-10-11 12:45:35,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870321265] [2020-10-11 12:45:35,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:35,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:45:35,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:35,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:35,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:35,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:35,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:35,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072186900] [2020-10-11 12:45:35,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:35,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:35,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:35,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:35,499 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-11 12:45:35,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:35,763 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-11 12:45:35,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:35,763 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:35,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:35,764 INFO L225 Difference]: With dead ends: 202 [2020-10-11 12:45:35,764 INFO L226 Difference]: Without dead ends: 200 [2020-10-11 12:45:35,764 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:35,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-11 12:45:35,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-11 12:45:35,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-11 12:45:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-11 12:45:35,767 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-11 12:45:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:35,767 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-11 12:45:35,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:35,767 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-11 12:45:35,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:35,768 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:35,768 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:35,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-11 12:45:35,968 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:35,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:35,969 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-10-11 12:45:35,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:35,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407072470] [2020-10-11 12:45:35,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:36,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407072470] [2020-10-11 12:45:36,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444048284] [2020-10-11 12:45:36,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:36,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:36,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:36,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:36,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:36,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:36,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:36,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057364132] [2020-10-11 12:45:36,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:36,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:36,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:36,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:36,212 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-11 12:45:36,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:36,470 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-11 12:45:36,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:36,471 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:36,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:36,471 INFO L225 Difference]: With dead ends: 197 [2020-10-11 12:45:36,471 INFO L226 Difference]: Without dead ends: 195 [2020-10-11 12:45:36,472 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:36,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-11 12:45:36,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-11 12:45:36,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:36,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-11 12:45:36,475 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-11 12:45:36,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:36,475 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-11 12:45:36,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-11 12:45:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:36,476 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:36,476 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:36,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-11 12:45:36,677 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:36,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:36,677 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-10-11 12:45:36,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:36,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607933679] [2020-10-11 12:45:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:36,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607933679] [2020-10-11 12:45:36,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134028814] [2020-10-11 12:45:36,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:36,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:36,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:36,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:36,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:36,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:36,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:36,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309009604] [2020-10-11 12:45:36,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:36,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:36,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:36,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:36,932 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-11 12:45:37,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:37,331 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-11 12:45:37,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 12:45:37,332 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:37,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:37,332 INFO L225 Difference]: With dead ends: 214 [2020-10-11 12:45:37,333 INFO L226 Difference]: Without dead ends: 212 [2020-10-11 12:45:37,333 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:45:37,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-11 12:45:37,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-11 12:45:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-11 12:45:37,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-11 12:45:37,337 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-11 12:45:37,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:37,337 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-11 12:45:37,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:37,337 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-11 12:45:37,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:37,337 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:37,338 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:37,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-11 12:45:37,542 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:37,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:37,542 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-10-11 12:45:37,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:37,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598845625] [2020-10-11 12:45:37,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:37,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598845625] [2020-10-11 12:45:37,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137267757] [2020-10-11 12:45:37,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:37,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:37,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:37,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:37,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:37,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:37,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:37,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751760597] [2020-10-11 12:45:37,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:37,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:37,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:37,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:37,777 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-11 12:45:38,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:38,174 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-11 12:45:38,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:45:38,175 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:38,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:38,176 INFO L225 Difference]: With dead ends: 217 [2020-10-11 12:45:38,176 INFO L226 Difference]: Without dead ends: 215 [2020-10-11 12:45:38,176 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:45:38,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-11 12:45:38,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-11 12:45:38,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-11 12:45:38,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-11 12:45:38,180 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-11 12:45:38,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:38,180 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-11 12:45:38,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-11 12:45:38,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:38,181 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:38,181 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:38,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:38,390 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:38,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:38,391 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-10-11 12:45:38,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:38,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518282267] [2020-10-11 12:45:38,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:38,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518282267] [2020-10-11 12:45:38,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114685357] [2020-10-11 12:45:38,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:38,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:38,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:38,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:38,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:38,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900218449] [2020-10-11 12:45:38,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:38,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:38,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:38,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:38,626 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-11 12:45:39,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:39,015 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-11 12:45:39,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:45:39,016 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:39,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:39,016 INFO L225 Difference]: With dead ends: 211 [2020-10-11 12:45:39,016 INFO L226 Difference]: Without dead ends: 209 [2020-10-11 12:45:39,016 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:45:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-11 12:45:39,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-11 12:45:39,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-11 12:45:39,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-11 12:45:39,019 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-11 12:45:39,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:39,019 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-11 12:45:39,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:39,020 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-11 12:45:39,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:39,020 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:39,020 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:39,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:39,221 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:39,221 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-10-11 12:45:39,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:39,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557529201] [2020-10-11 12:45:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:39,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:39,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557529201] [2020-10-11 12:45:39,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019833269] [2020-10-11 12:45:39,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:39,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:39,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:39,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:39,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:39,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:39,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:39,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:39,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526135923] [2020-10-11 12:45:39,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:39,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:39,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:39,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:39,429 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-11 12:45:39,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:39,874 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-11 12:45:39,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:45:39,874 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:39,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:39,875 INFO L225 Difference]: With dead ends: 211 [2020-10-11 12:45:39,875 INFO L226 Difference]: Without dead ends: 206 [2020-10-11 12:45:39,875 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:45:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-11 12:45:39,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-11 12:45:39,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-11 12:45:39,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-11 12:45:39,878 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-11 12:45:39,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:39,878 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-11 12:45:39,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-11 12:45:39,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:39,878 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:39,878 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:40,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-11 12:45:40,079 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:40,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:40,080 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-10-11 12:45:40,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:40,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708143576] [2020-10-11 12:45:40,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:40,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708143576] [2020-10-11 12:45:40,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293724721] [2020-10-11 12:45:40,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:40,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:45:40,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:40,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:40,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:40,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:40,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:40,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:40,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:40,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062935346] [2020-10-11 12:45:40,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:40,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:40,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:40,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:40,333 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-11 12:45:40,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:40,891 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-11 12:45:40,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:45:40,892 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:40,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:40,893 INFO L225 Difference]: With dead ends: 227 [2020-10-11 12:45:40,893 INFO L226 Difference]: Without dead ends: 222 [2020-10-11 12:45:40,894 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:45:40,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-11 12:45:40,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-11 12:45:40,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-11 12:45:40,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-11 12:45:40,897 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-11 12:45:40,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:40,897 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-11 12:45:40,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:40,897 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-11 12:45:40,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:40,897 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:40,898 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:41,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-11 12:45:41,099 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:41,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:41,099 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-10-11 12:45:41,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:41,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045858402] [2020-10-11 12:45:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:41,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:41,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045858402] [2020-10-11 12:45:41,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932404643] [2020-10-11 12:45:41,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:41,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:41,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:41,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:41,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:41,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:41,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:41,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956397731] [2020-10-11 12:45:41,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:41,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:41,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:41,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:41,328 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-11 12:45:41,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:41,771 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-11 12:45:41,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:45:41,772 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:41,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:41,773 INFO L225 Difference]: With dead ends: 221 [2020-10-11 12:45:41,773 INFO L226 Difference]: Without dead ends: 219 [2020-10-11 12:45:41,773 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:45:41,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-11 12:45:41,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-11 12:45:41,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-11 12:45:41,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-11 12:45:41,777 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-11 12:45:41,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:41,777 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-11 12:45:41,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:41,777 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-11 12:45:41,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:41,777 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:41,777 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:41,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:41,978 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:41,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:41,979 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-10-11 12:45:41,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:41,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516079935] [2020-10-11 12:45:41,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:42,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516079935] [2020-10-11 12:45:42,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202988129] [2020-10-11 12:45:42,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:42,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:42,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:42,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:42,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:42,216 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:42,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:42,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:42,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402049671] [2020-10-11 12:45:42,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:42,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:42,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:42,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:42,232 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-11 12:45:42,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:42,960 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-11 12:45:42,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:45:42,961 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:42,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:42,962 INFO L225 Difference]: With dead ends: 240 [2020-10-11 12:45:42,962 INFO L226 Difference]: Without dead ends: 232 [2020-10-11 12:45:42,963 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:45:42,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-11 12:45:42,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-11 12:45:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-11 12:45:42,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-11 12:45:42,968 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-11 12:45:42,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:42,968 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-11 12:45:42,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:42,968 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-11 12:45:42,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:42,969 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:42,969 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:43,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-11 12:45:43,182 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:43,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:43,183 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-10-11 12:45:43,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:43,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593322010] [2020-10-11 12:45:43,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:43,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593322010] [2020-10-11 12:45:43,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334975378] [2020-10-11 12:45:43,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:43,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:43,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:43,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:43,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:43,381 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:43,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:43,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:43,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294770210] [2020-10-11 12:45:43,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:43,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:43,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:43,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:43,393 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-11 12:45:43,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:43,974 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-11 12:45:43,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:45:43,974 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:43,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:43,975 INFO L225 Difference]: With dead ends: 238 [2020-10-11 12:45:43,975 INFO L226 Difference]: Without dead ends: 230 [2020-10-11 12:45:43,982 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:45:43,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-11 12:45:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-11 12:45:43,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:43,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-11 12:45:43,984 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-11 12:45:43,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:43,986 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-11 12:45:43,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:43,986 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-11 12:45:43,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:43,987 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:43,987 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:44,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:44,189 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:44,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:44,189 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-10-11 12:45:44,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:44,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331632299] [2020-10-11 12:45:44,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:44,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331632299] [2020-10-11 12:45:44,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367184425] [2020-10-11 12:45:44,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:44,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:44,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:44,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:44,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:44,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822717240] [2020-10-11 12:45:44,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:44,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:44,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:44,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:44,417 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-11 12:45:44,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:44,655 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-11 12:45:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:44,656 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:44,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:44,656 INFO L225 Difference]: With dead ends: 195 [2020-10-11 12:45:44,656 INFO L226 Difference]: Without dead ends: 193 [2020-10-11 12:45:44,657 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:44,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-11 12:45:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-11 12:45:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-11 12:45:44,660 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-11 12:45:44,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:44,660 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-11 12:45:44,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:44,660 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-11 12:45:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:44,660 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:44,660 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:44,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-11 12:45:44,865 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:44,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:44,865 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-10-11 12:45:44,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:44,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787049604] [2020-10-11 12:45:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:44,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787049604] [2020-10-11 12:45:44,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706462019] [2020-10-11 12:45:44,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:44,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:44,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:44,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:44,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:45,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:45,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:45,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951655920] [2020-10-11 12:45:45,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:45,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:45,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:45,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:45,102 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-11 12:45:45,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:45,549 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-11 12:45:45,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:45:45,550 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:45,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:45,550 INFO L225 Difference]: With dead ends: 206 [2020-10-11 12:45:45,550 INFO L226 Difference]: Without dead ends: 204 [2020-10-11 12:45:45,550 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:45:45,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-11 12:45:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-11 12:45:45,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-11 12:45:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-11 12:45:45,553 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-11 12:45:45,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:45,553 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-11 12:45:45,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:45,553 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-11 12:45:45,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:45,553 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:45,553 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:45,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:45,754 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:45,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:45,755 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-10-11 12:45:45,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:45,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154176050] [2020-10-11 12:45:45,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:45,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154176050] [2020-10-11 12:45:45,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401284186] [2020-10-11 12:45:45,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:45,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:45:45,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:45,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:45:45,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:45,999 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:46,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:46,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:46,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300263042] [2020-10-11 12:45:46,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:46,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:46,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:46,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:46,034 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 15 states. [2020-10-11 12:45:46,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:46,590 INFO L93 Difference]: Finished difference Result 224 states and 535 transitions. [2020-10-11 12:45:46,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:45:46,590 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:46,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:46,591 INFO L225 Difference]: With dead ends: 224 [2020-10-11 12:45:46,591 INFO L226 Difference]: Without dead ends: 219 [2020-10-11 12:45:46,592 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=270, Invalid=660, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:45:46,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-11 12:45:46,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 139. [2020-10-11 12:45:46,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-11 12:45:46,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-11 12:45:46,596 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-11 12:45:46,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:46,596 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-11 12:45:46,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:46,597 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-11 12:45:46,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:46,597 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:46,597 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:46,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-11 12:45:46,806 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:46,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:46,806 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-10-11 12:45:46,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:46,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453997422] [2020-10-11 12:45:46,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:46,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453997422] [2020-10-11 12:45:46,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437854424] [2020-10-11 12:45:46,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:46,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:46,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:46,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:46,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:47,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:47,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:47,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:47,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713846874] [2020-10-11 12:45:47,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:47,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:47,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:47,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:47,039 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-11 12:45:47,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:47,239 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-11 12:45:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:47,240 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:47,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:47,240 INFO L225 Difference]: With dead ends: 194 [2020-10-11 12:45:47,241 INFO L226 Difference]: Without dead ends: 192 [2020-10-11 12:45:47,241 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:47,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-11 12:45:47,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-11 12:45:47,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-11 12:45:47,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-11 12:45:47,244 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-11 12:45:47,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:47,244 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-11 12:45:47,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:47,244 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-11 12:45:47,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:47,244 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:47,245 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:47,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:47,445 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:47,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:47,446 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-10-11 12:45:47,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:47,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12086640] [2020-10-11 12:45:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:47,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12086640] [2020-10-11 12:45:47,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808145387] [2020-10-11 12:45:47,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:47,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:47,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:47,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:47,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:47,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:47,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:47,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443275548] [2020-10-11 12:45:47,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:47,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:47,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:47,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:47,696 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-11 12:45:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:47,971 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-11 12:45:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:47,971 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:47,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:47,972 INFO L225 Difference]: With dead ends: 205 [2020-10-11 12:45:47,972 INFO L226 Difference]: Without dead ends: 203 [2020-10-11 12:45:47,972 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:47,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-11 12:45:47,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-11 12:45:47,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:47,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-11 12:45:47,975 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-11 12:45:47,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:47,976 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-11 12:45:47,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:47,976 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-11 12:45:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:47,976 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:47,976 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:48,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:48,184 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:48,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:48,184 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-10-11 12:45:48,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:48,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393097826] [2020-10-11 12:45:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:48,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393097826] [2020-10-11 12:45:48,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757836466] [2020-10-11 12:45:48,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:48,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:45:48,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:48,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:48,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:48,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:48,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:48,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480990220] [2020-10-11 12:45:48,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:48,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:48,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:48,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:48,450 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-11 12:45:48,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:48,691 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-11 12:45:48,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:48,692 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:48,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:48,693 INFO L225 Difference]: With dead ends: 201 [2020-10-11 12:45:48,693 INFO L226 Difference]: Without dead ends: 199 [2020-10-11 12:45:48,693 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-11 12:45:48,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-11 12:45:48,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-11 12:45:48,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-11 12:45:48,696 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-11 12:45:48,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:48,696 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-11 12:45:48,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:48,697 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-11 12:45:48,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:48,697 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:48,697 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:48,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:48,898 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:48,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:48,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-10-11 12:45:48,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:48,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039069544] [2020-10-11 12:45:48,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:48,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039069544] [2020-10-11 12:45:48,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704188432] [2020-10-11 12:45:48,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:49,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:49,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:49,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:49,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:49,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081101788] [2020-10-11 12:45:49,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:49,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:49,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:49,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:49,141 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-11 12:45:49,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:49,352 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-11 12:45:49,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:49,353 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:49,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:49,353 INFO L225 Difference]: With dead ends: 194 [2020-10-11 12:45:49,353 INFO L226 Difference]: Without dead ends: 192 [2020-10-11 12:45:49,354 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-11 12:45:49,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-11 12:45:49,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-11 12:45:49,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-11 12:45:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-11 12:45:49,357 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-11 12:45:49,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:49,357 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-11 12:45:49,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:49,357 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-11 12:45:49,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:49,357 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:49,357 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:49,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-11 12:45:49,558 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:49,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:49,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-10-11 12:45:49,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:49,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829657142] [2020-10-11 12:45:49,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:49,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829657142] [2020-10-11 12:45:49,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797194944] [2020-10-11 12:45:49,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:49,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:49,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:49,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:49,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:49,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:49,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:49,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458881071] [2020-10-11 12:45:49,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:49,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:49,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:49,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:49,804 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-11 12:45:50,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:50,111 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-11 12:45:50,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:45:50,112 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:50,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:50,112 INFO L225 Difference]: With dead ends: 209 [2020-10-11 12:45:50,112 INFO L226 Difference]: Without dead ends: 207 [2020-10-11 12:45:50,113 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:45:50,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-11 12:45:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-11 12:45:50,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-11 12:45:50,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-11 12:45:50,115 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-11 12:45:50,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:50,115 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-11 12:45:50,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:50,115 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-11 12:45:50,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:50,116 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:50,116 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:50,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:50,317 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:50,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:50,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-10-11 12:45:50,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:50,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77373733] [2020-10-11 12:45:50,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:50,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77373733] [2020-10-11 12:45:50,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113296172] [2020-10-11 12:45:50,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:50,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:45:50,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:50,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:50,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:50,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:50,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:50,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176873975] [2020-10-11 12:45:50,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:50,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:50,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:50,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:50,559 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-11 12:45:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:50,868 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-11 12:45:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:45:50,869 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:50,869 INFO L225 Difference]: With dead ends: 202 [2020-10-11 12:45:50,869 INFO L226 Difference]: Without dead ends: 200 [2020-10-11 12:45:50,870 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:45:50,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-11 12:45:50,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-11 12:45:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-11 12:45:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-11 12:45:50,872 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-11 12:45:50,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:50,873 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-11 12:45:50,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-11 12:45:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:50,873 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:50,873 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:51,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-11 12:45:51,081 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:51,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:51,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-10-11 12:45:51,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:51,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387363072] [2020-10-11 12:45:51,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:51,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387363072] [2020-10-11 12:45:51,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144158448] [2020-10-11 12:45:51,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:51,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:51,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:51,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:51,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:51,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:51,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:51,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912492544] [2020-10-11 12:45:51,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:51,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:51,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:51,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:51,318 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-11 12:45:51,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:51,602 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-11 12:45:51,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:45:51,603 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:51,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:51,603 INFO L225 Difference]: With dead ends: 201 [2020-10-11 12:45:51,603 INFO L226 Difference]: Without dead ends: 199 [2020-10-11 12:45:51,604 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:45:51,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-11 12:45:51,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-11 12:45:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-11 12:45:51,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-11 12:45:51,607 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-11 12:45:51,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:51,607 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-11 12:45:51,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:51,608 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-11 12:45:51,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:51,608 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:51,608 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:51,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-11 12:45:51,809 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:51,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:51,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-10-11 12:45:51,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:51,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718583707] [2020-10-11 12:45:51,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:51,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718583707] [2020-10-11 12:45:51,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37547400] [2020-10-11 12:45:51,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:51,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:51,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:51,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:51,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:52,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:52,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:52,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255329354] [2020-10-11 12:45:52,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:52,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:52,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:52,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:52,041 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-11 12:45:52,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:52,450 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-11 12:45:52,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 12:45:52,451 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:52,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:52,451 INFO L225 Difference]: With dead ends: 215 [2020-10-11 12:45:52,451 INFO L226 Difference]: Without dead ends: 213 [2020-10-11 12:45:52,452 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:45:52,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-11 12:45:52,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-11 12:45:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:52,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-11 12:45:52,455 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-11 12:45:52,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:52,456 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-11 12:45:52,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:52,456 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-11 12:45:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:52,456 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:52,457 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:52,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:52,665 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:52,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:52,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-10-11 12:45:52,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:52,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141236869] [2020-10-11 12:45:52,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:52,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141236869] [2020-10-11 12:45:52,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030371079] [2020-10-11 12:45:52,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:52,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:45:52,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:52,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:52,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:52,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:52,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:52,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:52,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167461909] [2020-10-11 12:45:52,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:52,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:52,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:52,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:52,897 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-11 12:45:53,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:53,246 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-11 12:45:53,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:45:53,247 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:53,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:53,248 INFO L225 Difference]: With dead ends: 196 [2020-10-11 12:45:53,248 INFO L226 Difference]: Without dead ends: 194 [2020-10-11 12:45:53,249 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:45:53,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-11 12:45:53,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-11 12:45:53,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-11 12:45:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-11 12:45:53,253 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-11 12:45:53,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:53,253 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-11 12:45:53,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-11 12:45:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:53,254 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:53,254 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:53,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:53,457 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:53,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:53,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-10-11 12:45:53,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:53,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84552674] [2020-10-11 12:45:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:53,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84552674] [2020-10-11 12:45:53,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106799654] [2020-10-11 12:45:53,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:53,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:53,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:53,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:53,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:53,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:53,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108508109] [2020-10-11 12:45:53,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:53,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:53,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:53,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:53,661 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-11 12:45:53,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:53,999 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-11 12:45:54,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:54,000 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:54,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:54,001 INFO L225 Difference]: With dead ends: 191 [2020-10-11 12:45:54,001 INFO L226 Difference]: Without dead ends: 186 [2020-10-11 12:45:54,001 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:45:54,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-11 12:45:54,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-11 12:45:54,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-11 12:45:54,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-11 12:45:54,007 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-11 12:45:54,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:54,007 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-11 12:45:54,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:54,007 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-11 12:45:54,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:54,008 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:54,008 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:54,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-11 12:45:54,218 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:54,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:54,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-10-11 12:45:54,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:54,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277874816] [2020-10-11 12:45:54,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:54,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277874816] [2020-10-11 12:45:54,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699695022] [2020-10-11 12:45:54,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:54,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:54,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:54,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:54,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:54,454 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:54,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:54,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:54,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:54,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390665167] [2020-10-11 12:45:54,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:54,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:54,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:54,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:54,497 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-11 12:45:55,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:55,001 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-11 12:45:55,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:45:55,001 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:55,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:55,002 INFO L225 Difference]: With dead ends: 232 [2020-10-11 12:45:55,002 INFO L226 Difference]: Without dead ends: 227 [2020-10-11 12:45:55,003 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:45:55,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-11 12:45:55,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-11 12:45:55,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-11 12:45:55,006 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-11 12:45:55,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:55,006 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-11 12:45:55,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:55,006 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-11 12:45:55,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:55,006 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:55,007 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:55,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:55,207 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:55,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:55,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-10-11 12:45:55,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:55,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361823128] [2020-10-11 12:45:55,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:55,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361823128] [2020-10-11 12:45:55,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587230479] [2020-10-11 12:45:55,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:55,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:45:55,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:55,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 12:45:55,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:55,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:55,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:55,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398778992] [2020-10-11 12:45:55,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:55,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:55,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:55,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:55,425 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-11 12:45:56,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:56,066 INFO L93 Difference]: Finished difference Result 243 states and 560 transitions. [2020-10-11 12:45:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 12:45:56,067 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:56,067 INFO L225 Difference]: With dead ends: 243 [2020-10-11 12:45:56,068 INFO L226 Difference]: Without dead ends: 239 [2020-10-11 12:45:56,068 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:45:56,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-11 12:45:56,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 144. [2020-10-11 12:45:56,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-11 12:45:56,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-11 12:45:56,071 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-11 12:45:56,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:56,071 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-11 12:45:56,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:56,071 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-11 12:45:56,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:56,071 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:56,071 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:56,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:56,272 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:56,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:56,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-10-11 12:45:56,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:56,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308282532] [2020-10-11 12:45:56,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:56,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308282532] [2020-10-11 12:45:56,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976683564] [2020-10-11 12:45:56,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:56,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:56,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:56,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:56,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:56,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:56,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:56,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:56,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036335291] [2020-10-11 12:45:56,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:56,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:56,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:56,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:56,546 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-11 12:45:57,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:57,234 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-11 12:45:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:45:57,234 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:57,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:57,236 INFO L225 Difference]: With dead ends: 254 [2020-10-11 12:45:57,236 INFO L226 Difference]: Without dead ends: 246 [2020-10-11 12:45:57,236 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:45:57,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-11 12:45:57,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-11 12:45:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-11 12:45:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-11 12:45:57,241 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-11 12:45:57,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:57,241 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-11 12:45:57,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:57,241 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-11 12:45:57,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:57,242 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:57,242 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:57,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:57,451 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:57,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:57,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-10-11 12:45:57,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:57,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840720344] [2020-10-11 12:45:57,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:57,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840720344] [2020-10-11 12:45:57,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559963108] [2020-10-11 12:45:57,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:57,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:57,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:57,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:57,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:57,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:57,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:57,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:57,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835573764] [2020-10-11 12:45:57,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:57,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:57,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:57,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:57,701 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-11 12:45:58,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:58,390 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-11 12:45:58,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:45:58,391 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:58,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:58,391 INFO L225 Difference]: With dead ends: 246 [2020-10-11 12:45:58,392 INFO L226 Difference]: Without dead ends: 238 [2020-10-11 12:45:58,392 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 12:45:58,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-11 12:45:58,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-11 12:45:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-11 12:45:58,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-11 12:45:58,396 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-11 12:45:58,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:58,396 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-11 12:45:58,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:58,396 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-11 12:45:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:58,397 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:58,397 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:58,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-11 12:45:58,608 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:58,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:58,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-10-11 12:45:58,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:58,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443005549] [2020-10-11 12:45:58,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:58,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443005549] [2020-10-11 12:45:58,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523681549] [2020-10-11 12:45:58,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:58,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:45:58,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:58,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:58,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:58,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:58,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:58,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990843315] [2020-10-11 12:45:58,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:58,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:58,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:58,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:58,839 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-11 12:45:59,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:59,196 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-11 12:45:59,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:45:59,197 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:59,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:59,198 INFO L225 Difference]: With dead ends: 208 [2020-10-11 12:45:59,198 INFO L226 Difference]: Without dead ends: 206 [2020-10-11 12:45:59,198 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:45:59,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-11 12:45:59,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-11 12:45:59,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-11 12:45:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-11 12:45:59,201 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-11 12:45:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:59,201 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-11 12:45:59,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:59,201 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-11 12:45:59,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:59,201 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:59,201 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:59,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-11 12:45:59,402 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:59,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:59,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-10-11 12:45:59,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:59,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842189151] [2020-10-11 12:45:59,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:59,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842189151] [2020-10-11 12:45:59,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828855312] [2020-10-11 12:45:59,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:59,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:59,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:59,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:59,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:59,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725639202] [2020-10-11 12:45:59,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:59,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:59,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:59,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:59,631 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-11 12:46:00,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:00,106 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-11 12:46:00,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:46:00,107 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:46:00,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:00,108 INFO L225 Difference]: With dead ends: 215 [2020-10-11 12:46:00,108 INFO L226 Difference]: Without dead ends: 213 [2020-10-11 12:46:00,108 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:46:00,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-11 12:46:00,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-11 12:46:00,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-11 12:46:00,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-11 12:46:00,111 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-11 12:46:00,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:00,111 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-11 12:46:00,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:46:00,111 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-11 12:46:00,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:46:00,111 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:00,112 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:00,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-11 12:46:00,312 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:00,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:00,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-10-11 12:46:00,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:00,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528906282] [2020-10-11 12:46:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:00,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528906282] [2020-10-11 12:46:00,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728457171] [2020-10-11 12:46:00,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:00,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:46:00,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:00,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:46:00,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:00,521 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:46:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:00,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:00,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:46:00,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790112121] [2020-10-11 12:46:00,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:46:00,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:00,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:46:00,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:46:00,532 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-11 12:46:01,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:01,063 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-11 12:46:01,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:46:01,063 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:46:01,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:01,064 INFO L225 Difference]: With dead ends: 236 [2020-10-11 12:46:01,064 INFO L226 Difference]: Without dead ends: 228 [2020-10-11 12:46:01,064 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:46:01,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-11 12:46:01,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-11 12:46:01,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-11 12:46:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-11 12:46:01,066 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-11 12:46:01,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:01,066 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-11 12:46:01,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:46:01,067 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-11 12:46:01,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:46:01,067 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:01,067 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:01,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-11 12:46:01,268 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:01,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:01,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-10-11 12:46:01,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:01,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294761078] [2020-10-11 12:46:01,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:01,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294761078] [2020-10-11 12:46:01,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719289495] [2020-10-11 12:46:01,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:01,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:46:01,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:01,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:46:01,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:01,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:46:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:01,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:01,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:46:01,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893597169] [2020-10-11 12:46:01,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:46:01,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:01,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:46:01,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:46:01,496 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-11 12:46:02,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:02,063 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-11 12:46:02,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:46:02,064 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:46:02,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:02,065 INFO L225 Difference]: With dead ends: 241 [2020-10-11 12:46:02,065 INFO L226 Difference]: Without dead ends: 233 [2020-10-11 12:46:02,065 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:46:02,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-11 12:46:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-11 12:46:02,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-11 12:46:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-11 12:46:02,068 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-11 12:46:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:02,068 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-11 12:46:02,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:46:02,069 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-11 12:46:02,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:46:02,069 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:02,069 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:02,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-11 12:46:02,277 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:02,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:02,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-10-11 12:46:02,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:02,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231575322] [2020-10-11 12:46:02,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:02,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231575322] [2020-10-11 12:46:02,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698390538] [2020-10-11 12:46:02,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:02,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:46:02,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:02,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:46:02,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:02,495 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:46:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:02,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:02,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:46:02,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076205506] [2020-10-11 12:46:02,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:46:02,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:02,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:46:02,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:46:02,509 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-11 12:46:03,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:03,055 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-11 12:46:03,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:46:03,056 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:46:03,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:03,057 INFO L225 Difference]: With dead ends: 232 [2020-10-11 12:46:03,057 INFO L226 Difference]: Without dead ends: 224 [2020-10-11 12:46:03,057 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:46:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-11 12:46:03,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-11 12:46:03,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-11 12:46:03,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-11 12:46:03,061 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-11 12:46:03,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:03,061 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-11 12:46:03,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:46:03,061 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-11 12:46:03,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:46:03,062 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:03,062 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:03,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:03,263 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:03,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:03,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-10-11 12:46:03,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:03,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243481035] [2020-10-11 12:46:03,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:03,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243481035] [2020-10-11 12:46:03,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964342239] [2020-10-11 12:46:03,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:03,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 12:46:03,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:03,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 12:46:03,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:03,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 12:46:03,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2020-10-11 12:46:03,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610126394] [2020-10-11 12:46:03,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 12:46:03,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:03,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 12:46:03,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:46:03,485 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 8 states. [2020-10-11 12:46:03,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:03,510 INFO L93 Difference]: Finished difference Result 195 states and 513 transitions. [2020-10-11 12:46:03,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:46:03,511 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-11 12:46:03,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:03,511 INFO L225 Difference]: With dead ends: 195 [2020-10-11 12:46:03,512 INFO L226 Difference]: Without dead ends: 188 [2020-10-11 12:46:03,512 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:46:03,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-11 12:46:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-10-11 12:46:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-11 12:46:03,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 500 transitions. [2020-10-11 12:46:03,515 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 500 transitions. Word has length 13 [2020-10-11 12:46:03,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:03,516 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 500 transitions. [2020-10-11 12:46:03,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 12:46:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 500 transitions. [2020-10-11 12:46:03,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:46:03,516 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:03,516 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:03,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-11 12:46:03,724 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:03,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:03,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-10-11 12:46:03,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:03,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271969686] [2020-10-11 12:46:03,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:03,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271969686] [2020-10-11 12:46:03,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3671245] [2020-10-11 12:46:03,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:03,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:46:03,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:03,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:03,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:04,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:04,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:04,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492130446] [2020-10-11 12:46:04,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:04,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:04,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:04,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:04,123 INFO L87 Difference]: Start difference. First operand 188 states and 500 transitions. Second operand 17 states. [2020-10-11 12:46:04,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:04,175 INFO L93 Difference]: Finished difference Result 249 states and 638 transitions. [2020-10-11 12:46:04,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:46:04,176 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-11 12:46:04,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:04,177 INFO L225 Difference]: With dead ends: 249 [2020-10-11 12:46:04,177 INFO L226 Difference]: Without dead ends: 241 [2020-10-11 12:46:04,177 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:04,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-11 12:46:04,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 197. [2020-10-11 12:46:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-11 12:46:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 521 transitions. [2020-10-11 12:46:04,181 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 521 transitions. Word has length 13 [2020-10-11 12:46:04,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:04,181 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 521 transitions. [2020-10-11 12:46:04,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:04,181 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 521 transitions. [2020-10-11 12:46:04,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:46:04,181 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:04,182 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:04,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-11 12:46:04,382 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:04,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:04,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1413108102, now seen corresponding path program 22 times [2020-10-11 12:46:04,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:04,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526661905] [2020-10-11 12:46:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:04,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526661905] [2020-10-11 12:46:04,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756080262] [2020-10-11 12:46:04,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:04,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:46:04,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:04,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 12:46:04,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:04,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 12:46:04,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2020-10-11 12:46:04,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954024354] [2020-10-11 12:46:04,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 12:46:04,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:04,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 12:46:04,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:46:04,633 INFO L87 Difference]: Start difference. First operand 197 states and 521 transitions. Second operand 8 states. [2020-10-11 12:46:04,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:04,658 INFO L93 Difference]: Finished difference Result 278 states and 705 transitions. [2020-10-11 12:46:04,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:46:04,659 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-11 12:46:04,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:04,660 INFO L225 Difference]: With dead ends: 278 [2020-10-11 12:46:04,660 INFO L226 Difference]: Without dead ends: 248 [2020-10-11 12:46:04,660 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:46:04,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-11 12:46:04,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2020-10-11 12:46:04,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-11 12:46:04,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 626 transitions. [2020-10-11 12:46:04,664 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 626 transitions. Word has length 13 [2020-10-11 12:46:04,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:04,664 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 626 transitions. [2020-10-11 12:46:04,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 12:46:04,664 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 626 transitions. [2020-10-11 12:46:04,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:04,664 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:04,665 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:04,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:04,865 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:04,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:04,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-10-11 12:46:04,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:04,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969530454] [2020-10-11 12:46:04,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:04,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969530454] [2020-10-11 12:46:04,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403261868] [2020-10-11 12:46:04,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:05,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:46:05,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:05,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:05,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:05,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:05,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:05,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651719535] [2020-10-11 12:46:05,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:05,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:05,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:05,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:05,184 INFO L87 Difference]: Start difference. First operand 240 states and 626 transitions. Second operand 17 states. [2020-10-11 12:46:05,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:05,276 INFO L93 Difference]: Finished difference Result 275 states and 692 transitions. [2020-10-11 12:46:05,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:46:05,277 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:05,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:05,277 INFO L225 Difference]: With dead ends: 275 [2020-10-11 12:46:05,278 INFO L226 Difference]: Without dead ends: 273 [2020-10-11 12:46:05,278 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:05,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-11 12:46:05,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 250. [2020-10-11 12:46:05,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-11 12:46:05,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 654 transitions. [2020-10-11 12:46:05,282 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 654 transitions. Word has length 14 [2020-10-11 12:46:05,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:05,282 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 654 transitions. [2020-10-11 12:46:05,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:05,282 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 654 transitions. [2020-10-11 12:46:05,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:05,283 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:05,283 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:05,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:05,492 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:05,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:05,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-10-11 12:46:05,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:05,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210858894] [2020-10-11 12:46:05,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:05,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210858894] [2020-10-11 12:46:05,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187745160] [2020-10-11 12:46:05,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:05,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:46:05,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:05,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:05,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:05,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:05,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:05,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039403880] [2020-10-11 12:46:05,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:05,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:05,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:05,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:05,793 INFO L87 Difference]: Start difference. First operand 250 states and 654 transitions. Second operand 17 states. [2020-10-11 12:46:06,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:06,019 INFO L93 Difference]: Finished difference Result 295 states and 735 transitions. [2020-10-11 12:46:06,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:46:06,020 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:06,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:06,022 INFO L225 Difference]: With dead ends: 295 [2020-10-11 12:46:06,022 INFO L226 Difference]: Without dead ends: 292 [2020-10-11 12:46:06,022 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-11 12:46:06,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-11 12:46:06,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 251. [2020-10-11 12:46:06,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-11 12:46:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 657 transitions. [2020-10-11 12:46:06,027 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 657 transitions. Word has length 14 [2020-10-11 12:46:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:06,027 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 657 transitions. [2020-10-11 12:46:06,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:06,028 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 657 transitions. [2020-10-11 12:46:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:06,028 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:06,028 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:06,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:06,241 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:06,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:06,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-10-11 12:46:06,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:06,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027949195] [2020-10-11 12:46:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:06,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027949195] [2020-10-11 12:46:06,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209981120] [2020-10-11 12:46:06,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:06,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:06,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:06,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:06,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:06,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598694010] [2020-10-11 12:46:06,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:06,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:06,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:06,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:06,645 INFO L87 Difference]: Start difference. First operand 251 states and 657 transitions. Second operand 17 states. [2020-10-11 12:46:06,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:06,906 INFO L93 Difference]: Finished difference Result 320 states and 793 transitions. [2020-10-11 12:46:06,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:46:06,906 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:06,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:06,908 INFO L225 Difference]: With dead ends: 320 [2020-10-11 12:46:06,908 INFO L226 Difference]: Without dead ends: 316 [2020-10-11 12:46:06,908 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:46:06,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-11 12:46:06,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 253. [2020-10-11 12:46:06,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-11 12:46:06,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 663 transitions. [2020-10-11 12:46:06,913 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 663 transitions. Word has length 14 [2020-10-11 12:46:06,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:06,913 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 663 transitions. [2020-10-11 12:46:06,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:06,914 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 663 transitions. [2020-10-11 12:46:06,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:06,914 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:06,914 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:07,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:07,126 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:07,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:07,127 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-10-11 12:46:07,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:07,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098368716] [2020-10-11 12:46:07,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:07,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098368716] [2020-10-11 12:46:07,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634950494] [2020-10-11 12:46:07,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:07,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:46:07,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:07,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:07,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:07,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:07,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:07,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537437059] [2020-10-11 12:46:07,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:07,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:07,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:07,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:07,487 INFO L87 Difference]: Start difference. First operand 253 states and 663 transitions. Second operand 17 states. [2020-10-11 12:46:07,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:07,784 INFO L93 Difference]: Finished difference Result 316 states and 781 transitions. [2020-10-11 12:46:07,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:46:07,785 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:07,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:07,786 INFO L225 Difference]: With dead ends: 316 [2020-10-11 12:46:07,786 INFO L226 Difference]: Without dead ends: 313 [2020-10-11 12:46:07,786 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:46:07,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-11 12:46:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 255. [2020-10-11 12:46:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-11 12:46:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 669 transitions. [2020-10-11 12:46:07,792 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 669 transitions. Word has length 14 [2020-10-11 12:46:07,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:07,792 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 669 transitions. [2020-10-11 12:46:07,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:07,792 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 669 transitions. [2020-10-11 12:46:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:07,793 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:07,793 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:07,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-11 12:46:07,997 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:07,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:07,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-10-11 12:46:07,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:07,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758047543] [2020-10-11 12:46:07,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:08,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758047543] [2020-10-11 12:46:08,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433024510] [2020-10-11 12:46:08,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:08,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:46:08,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:08,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:08,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:11,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:11,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:11,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570938329] [2020-10-11 12:46:11,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:11,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:11,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:11,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:46:11,463 INFO L87 Difference]: Start difference. First operand 255 states and 669 transitions. Second operand 17 states. [2020-10-11 12:46:15,661 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:46:15,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:15,895 INFO L93 Difference]: Finished difference Result 342 states and 843 transitions. [2020-10-11 12:46:15,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:46:15,895 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:15,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:15,896 INFO L225 Difference]: With dead ends: 342 [2020-10-11 12:46:15,896 INFO L226 Difference]: Without dead ends: 337 [2020-10-11 12:46:15,897 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-11 12:46:15,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-11 12:46:15,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 256. [2020-10-11 12:46:15,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-11 12:46:15,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-10-11 12:46:15,901 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-10-11 12:46:15,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:15,902 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-10-11 12:46:15,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:15,902 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-10-11 12:46:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:15,902 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:15,902 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:16,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-11 12:46:16,110 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:16,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:16,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-10-11 12:46:16,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:16,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091684712] [2020-10-11 12:46:16,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:16,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091684712] [2020-10-11 12:46:16,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011351634] [2020-10-11 12:46:16,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:16,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:46:16,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:16,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:16,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:16,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:16,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:16,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019054756] [2020-10-11 12:46:16,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:16,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:16,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:16,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:16,502 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-10-11 12:46:16,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:16,815 INFO L93 Difference]: Finished difference Result 331 states and 819 transitions. [2020-10-11 12:46:16,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:46:16,816 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:16,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:16,817 INFO L225 Difference]: With dead ends: 331 [2020-10-11 12:46:16,817 INFO L226 Difference]: Without dead ends: 327 [2020-10-11 12:46:16,817 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:46:16,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-11 12:46:16,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 256. [2020-10-11 12:46:16,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-11 12:46:16,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-10-11 12:46:16,821 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-10-11 12:46:16,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:16,821 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-10-11 12:46:16,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:16,821 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-10-11 12:46:16,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:16,822 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:16,822 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:17,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-11 12:46:17,025 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:17,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:17,026 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-10-11 12:46:17,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:17,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782248348] [2020-10-11 12:46:17,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:17,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782248348] [2020-10-11 12:46:17,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639884738] [2020-10-11 12:46:17,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:17,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:46:17,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:17,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:17,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:17,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:17,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:17,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873166549] [2020-10-11 12:46:17,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:17,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:17,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:17,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:17,324 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-10-11 12:46:17,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:17,631 INFO L93 Difference]: Finished difference Result 321 states and 792 transitions. [2020-10-11 12:46:17,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:46:17,632 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:17,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:17,634 INFO L225 Difference]: With dead ends: 321 [2020-10-11 12:46:17,634 INFO L226 Difference]: Without dead ends: 318 [2020-10-11 12:46:17,634 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:46:17,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-11 12:46:17,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 259. [2020-10-11 12:46:17,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-11 12:46:17,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-10-11 12:46:17,639 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-10-11 12:46:17,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:17,640 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-10-11 12:46:17,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:17,640 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-10-11 12:46:17,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:17,640 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:17,641 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:17,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-11 12:46:17,851 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:17,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:17,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-10-11 12:46:17,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:17,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850021945] [2020-10-11 12:46:17,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:17,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850021945] [2020-10-11 12:46:17,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329924032] [2020-10-11 12:46:17,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:17,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:46:17,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:17,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:17,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:18,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:18,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:18,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610091271] [2020-10-11 12:46:18,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:18,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:18,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:18,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:18,160 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-10-11 12:46:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:18,477 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-10-11 12:46:18,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:46:18,478 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:18,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:18,479 INFO L225 Difference]: With dead ends: 348 [2020-10-11 12:46:18,479 INFO L226 Difference]: Without dead ends: 343 [2020-10-11 12:46:18,479 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:46:18,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-11 12:46:18,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 260. [2020-10-11 12:46:18,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-11 12:46:18,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 684 transitions. [2020-10-11 12:46:18,482 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 684 transitions. Word has length 14 [2020-10-11 12:46:18,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:18,483 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 684 transitions. [2020-10-11 12:46:18,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:18,483 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 684 transitions. [2020-10-11 12:46:18,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:18,483 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:18,483 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:18,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-11 12:46:18,684 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:18,684 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-10-11 12:46:18,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:18,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915088942] [2020-10-11 12:46:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:18,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915088942] [2020-10-11 12:46:18,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335280854] [2020-10-11 12:46:18,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:18,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:18,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:18,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:18,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:18,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128742153] [2020-10-11 12:46:18,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:18,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:18,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:18,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:18,968 INFO L87 Difference]: Start difference. First operand 260 states and 684 transitions. Second operand 17 states. [2020-10-11 12:46:19,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:19,249 INFO L93 Difference]: Finished difference Result 349 states and 864 transitions. [2020-10-11 12:46:19,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:46:19,249 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:19,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:19,250 INFO L225 Difference]: With dead ends: 349 [2020-10-11 12:46:19,250 INFO L226 Difference]: Without dead ends: 344 [2020-10-11 12:46:19,250 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:46:19,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-11 12:46:19,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 259. [2020-10-11 12:46:19,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-11 12:46:19,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-10-11 12:46:19,255 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-10-11 12:46:19,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:19,255 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-10-11 12:46:19,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:19,255 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-10-11 12:46:19,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:19,256 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:19,256 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:19,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-11 12:46:19,456 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:19,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:19,457 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-10-11 12:46:19,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:19,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277845851] [2020-10-11 12:46:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:19,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277845851] [2020-10-11 12:46:19,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543135648] [2020-10-11 12:46:19,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:19,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:46:19,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:19,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:19,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:19,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:19,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:19,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782497515] [2020-10-11 12:46:19,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:19,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:19,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:19,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:19,755 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-10-11 12:46:20,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:20,016 INFO L93 Difference]: Finished difference Result 332 states and 822 transitions. [2020-10-11 12:46:20,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:46:20,017 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:20,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:20,018 INFO L225 Difference]: With dead ends: 332 [2020-10-11 12:46:20,018 INFO L226 Difference]: Without dead ends: 314 [2020-10-11 12:46:20,019 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:46:20,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-11 12:46:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 260. [2020-10-11 12:46:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-11 12:46:20,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 677 transitions. [2020-10-11 12:46:20,023 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 677 transitions. Word has length 14 [2020-10-11 12:46:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:20,023 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 677 transitions. [2020-10-11 12:46:20,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:20,023 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 677 transitions. [2020-10-11 12:46:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:20,024 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:20,024 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:20,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:20,225 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:20,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:20,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-10-11 12:46:20,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:20,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455517312] [2020-10-11 12:46:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:20,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455517312] [2020-10-11 12:46:20,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830150787] [2020-10-11 12:46:20,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:20,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:46:20,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:20,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:20,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:20,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:20,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:20,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886896882] [2020-10-11 12:46:20,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:20,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:20,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:20,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:20,521 INFO L87 Difference]: Start difference. First operand 260 states and 677 transitions. Second operand 17 states. [2020-10-11 12:46:20,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:20,773 INFO L93 Difference]: Finished difference Result 315 states and 779 transitions. [2020-10-11 12:46:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:46:20,774 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:20,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:20,774 INFO L225 Difference]: With dead ends: 315 [2020-10-11 12:46:20,774 INFO L226 Difference]: Without dead ends: 312 [2020-10-11 12:46:20,774 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:46:20,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-11 12:46:20,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 265. [2020-10-11 12:46:20,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-11 12:46:20,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 690 transitions. [2020-10-11 12:46:20,778 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 690 transitions. Word has length 14 [2020-10-11 12:46:20,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:20,779 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 690 transitions. [2020-10-11 12:46:20,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:20,779 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 690 transitions. [2020-10-11 12:46:20,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:20,779 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:20,779 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:20,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:20,980 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:20,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:20,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-10-11 12:46:20,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:20,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938727412] [2020-10-11 12:46:20,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:21,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938727412] [2020-10-11 12:46:21,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966888877] [2020-10-11 12:46:21,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:21,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:46:21,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:21,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:21,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:21,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:21,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:21,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:21,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760391319] [2020-10-11 12:46:21,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:21,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:21,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:21,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:21,277 INFO L87 Difference]: Start difference. First operand 265 states and 690 transitions. Second operand 17 states. [2020-10-11 12:46:21,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:21,565 INFO L93 Difference]: Finished difference Result 334 states and 821 transitions. [2020-10-11 12:46:21,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:46:21,566 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:21,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:21,567 INFO L225 Difference]: With dead ends: 334 [2020-10-11 12:46:21,567 INFO L226 Difference]: Without dead ends: 330 [2020-10-11 12:46:21,568 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:46:21,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-11 12:46:21,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-10-11 12:46:21,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-11 12:46:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 687 transitions. [2020-10-11 12:46:21,573 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 687 transitions. Word has length 14 [2020-10-11 12:46:21,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:21,573 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 687 transitions. [2020-10-11 12:46:21,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:21,573 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 687 transitions. [2020-10-11 12:46:21,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:21,573 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:21,573 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:21,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:21,774 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:21,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:21,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-10-11 12:46:21,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:21,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678546419] [2020-10-11 12:46:21,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:21,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678546419] [2020-10-11 12:46:21,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296135979] [2020-10-11 12:46:21,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:21,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:46:21,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:21,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:21,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:22,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:22,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:22,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072176893] [2020-10-11 12:46:22,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:22,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:22,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:22,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:22,181 INFO L87 Difference]: Start difference. First operand 264 states and 687 transitions. Second operand 17 states. [2020-10-11 12:46:22,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:22,550 INFO L93 Difference]: Finished difference Result 351 states and 859 transitions. [2020-10-11 12:46:22,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:46:22,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:22,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:22,552 INFO L225 Difference]: With dead ends: 351 [2020-10-11 12:46:22,552 INFO L226 Difference]: Without dead ends: 346 [2020-10-11 12:46:22,552 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:46:22,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-11 12:46:22,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2020-10-11 12:46:22,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-11 12:46:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 700 transitions. [2020-10-11 12:46:22,556 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 700 transitions. Word has length 14 [2020-10-11 12:46:22,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:22,556 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 700 transitions. [2020-10-11 12:46:22,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:22,557 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 700 transitions. [2020-10-11 12:46:22,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:22,557 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:22,558 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:22,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:22,759 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:22,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:22,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-10-11 12:46:22,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:22,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23930748] [2020-10-11 12:46:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:22,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23930748] [2020-10-11 12:46:22,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488853171] [2020-10-11 12:46:22,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:22,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:46:22,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:22,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:22,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:23,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:23,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:23,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126031477] [2020-10-11 12:46:23,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:23,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:23,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:23,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:23,052 INFO L87 Difference]: Start difference. First operand 269 states and 700 transitions. Second operand 17 states. [2020-10-11 12:46:23,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:23,338 INFO L93 Difference]: Finished difference Result 357 states and 870 transitions. [2020-10-11 12:46:23,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:46:23,339 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:23,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:23,339 INFO L225 Difference]: With dead ends: 357 [2020-10-11 12:46:23,339 INFO L226 Difference]: Without dead ends: 339 [2020-10-11 12:46:23,340 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:46:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-10-11 12:46:23,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 269. [2020-10-11 12:46:23,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-11 12:46:23,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 696 transitions. [2020-10-11 12:46:23,343 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 696 transitions. Word has length 14 [2020-10-11 12:46:23,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:23,343 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 696 transitions. [2020-10-11 12:46:23,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:23,343 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 696 transitions. [2020-10-11 12:46:23,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:23,344 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:23,344 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:23,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:23,544 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:23,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:23,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-10-11 12:46:23,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:23,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846116302] [2020-10-11 12:46:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:23,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846116302] [2020-10-11 12:46:23,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574645499] [2020-10-11 12:46:23,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:23,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:23,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:23,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:23,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:23,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990294052] [2020-10-11 12:46:23,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:23,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:23,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:23,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:23,882 INFO L87 Difference]: Start difference. First operand 269 states and 696 transitions. Second operand 17 states. [2020-10-11 12:46:24,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:24,168 INFO L93 Difference]: Finished difference Result 332 states and 820 transitions. [2020-10-11 12:46:24,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:46:24,169 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:24,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:24,169 INFO L225 Difference]: With dead ends: 332 [2020-10-11 12:46:24,170 INFO L226 Difference]: Without dead ends: 327 [2020-10-11 12:46:24,170 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:46:24,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-11 12:46:24,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 266. [2020-10-11 12:46:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-11 12:46:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 689 transitions. [2020-10-11 12:46:24,175 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 689 transitions. Word has length 14 [2020-10-11 12:46:24,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:24,175 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 689 transitions. [2020-10-11 12:46:24,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 689 transitions. [2020-10-11 12:46:24,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:24,176 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:24,176 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:24,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-11 12:46:24,379 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:24,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:24,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-10-11 12:46:24,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:24,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111753895] [2020-10-11 12:46:24,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:24,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:24,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111753895] [2020-10-11 12:46:24,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695415990] [2020-10-11 12:46:24,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:24,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:46:24,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:24,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:24,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:24,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:24,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:24,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911336435] [2020-10-11 12:46:24,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:24,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:24,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:24,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:24,735 INFO L87 Difference]: Start difference. First operand 266 states and 689 transitions. Second operand 17 states. [2020-10-11 12:46:24,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:24,907 INFO L93 Difference]: Finished difference Result 322 states and 792 transitions. [2020-10-11 12:46:24,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:46:24,908 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:24,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:24,908 INFO L225 Difference]: With dead ends: 322 [2020-10-11 12:46:24,909 INFO L226 Difference]: Without dead ends: 309 [2020-10-11 12:46:24,909 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:46:24,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-11 12:46:24,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 268. [2020-10-11 12:46:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-11 12:46:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-10-11 12:46:24,912 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-10-11 12:46:24,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:24,912 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-10-11 12:46:24,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-10-11 12:46:24,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:24,913 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:24,913 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:25,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-11 12:46:25,114 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:25,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:25,114 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-10-11 12:46:25,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:25,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018328464] [2020-10-11 12:46:25,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:25,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018328464] [2020-10-11 12:46:25,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218492043] [2020-10-11 12:46:25,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:25,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:46:25,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:25,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:25,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:25,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:25,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:25,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42909008] [2020-10-11 12:46:25,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:25,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:25,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:25,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:25,471 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-10-11 12:46:25,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:25,550 INFO L93 Difference]: Finished difference Result 305 states and 753 transitions. [2020-10-11 12:46:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:46:25,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:25,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:25,552 INFO L225 Difference]: With dead ends: 305 [2020-10-11 12:46:25,552 INFO L226 Difference]: Without dead ends: 303 [2020-10-11 12:46:25,552 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:46:25,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-11 12:46:25,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2020-10-11 12:46:25,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-11 12:46:25,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 709 transitions. [2020-10-11 12:46:25,556 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 709 transitions. Word has length 14 [2020-10-11 12:46:25,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:25,557 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 709 transitions. [2020-10-11 12:46:25,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:25,557 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 709 transitions. [2020-10-11 12:46:25,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:25,557 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:25,557 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:25,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-11 12:46:25,765 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:25,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:25,766 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-10-11 12:46:25,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:25,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441850231] [2020-10-11 12:46:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:25,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441850231] [2020-10-11 12:46:25,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504318931] [2020-10-11 12:46:25,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:25,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:46:25,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:25,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:25,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:26,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:26,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:26,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437699747] [2020-10-11 12:46:26,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:26,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:26,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:26,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:26,119 INFO L87 Difference]: Start difference. First operand 274 states and 709 transitions. Second operand 17 states. [2020-10-11 12:46:26,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:26,359 INFO L93 Difference]: Finished difference Result 325 states and 802 transitions. [2020-10-11 12:46:26,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:46:26,360 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:26,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:26,361 INFO L225 Difference]: With dead ends: 325 [2020-10-11 12:46:26,361 INFO L226 Difference]: Without dead ends: 322 [2020-10-11 12:46:26,361 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:46:26,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-11 12:46:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 272. [2020-10-11 12:46:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-11 12:46:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-11 12:46:26,364 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-11 12:46:26,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:26,364 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-11 12:46:26,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:26,364 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-11 12:46:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:26,365 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:26,365 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:26,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-11 12:46:26,566 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:26,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:26,566 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-10-11 12:46:26,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:26,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505046046] [2020-10-11 12:46:26,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:26,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505046046] [2020-10-11 12:46:26,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012833082] [2020-10-11 12:46:26,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:26,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:46:26,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:26,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:26,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:26,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:26,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:26,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381522180] [2020-10-11 12:46:26,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:26,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:26,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:26,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:26,996 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-11 12:46:27,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:27,308 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-10-11 12:46:27,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:46:27,309 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:27,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:27,310 INFO L225 Difference]: With dead ends: 348 [2020-10-11 12:46:27,310 INFO L226 Difference]: Without dead ends: 344 [2020-10-11 12:46:27,310 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:46:27,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-11 12:46:27,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 270. [2020-10-11 12:46:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-11 12:46:27,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 697 transitions. [2020-10-11 12:46:27,314 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 697 transitions. Word has length 14 [2020-10-11 12:46:27,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:27,314 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 697 transitions. [2020-10-11 12:46:27,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:27,315 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 697 transitions. [2020-10-11 12:46:27,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:27,315 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:27,315 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:27,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:27,516 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:27,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:27,516 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-10-11 12:46:27,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:27,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305357729] [2020-10-11 12:46:27,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:27,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305357729] [2020-10-11 12:46:27,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845158467] [2020-10-11 12:46:27,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:27,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:46:27,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:27,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:27,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:29,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:29,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:29,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588395623] [2020-10-11 12:46:29,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:29,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:29,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:29,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:29,633 INFO L87 Difference]: Start difference. First operand 270 states and 697 transitions. Second operand 17 states. [2020-10-11 12:46:30,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:30,007 INFO L93 Difference]: Finished difference Result 338 states and 827 transitions. [2020-10-11 12:46:30,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:46:30,008 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:30,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:30,008 INFO L225 Difference]: With dead ends: 338 [2020-10-11 12:46:30,008 INFO L226 Difference]: Without dead ends: 335 [2020-10-11 12:46:30,009 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:46:30,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-11 12:46:30,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 272. [2020-10-11 12:46:30,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-11 12:46:30,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-11 12:46:30,013 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-11 12:46:30,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:30,013 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-11 12:46:30,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:30,013 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-11 12:46:30,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:30,014 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:30,014 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:30,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:30,224 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:30,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:30,225 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-10-11 12:46:30,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:30,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249813456] [2020-10-11 12:46:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:30,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249813456] [2020-10-11 12:46:30,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224989462] [2020-10-11 12:46:30,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:30,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:30,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:33,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:33,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:33,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831289793] [2020-10-11 12:46:33,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:33,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:33,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:33,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:46:33,455 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-11 12:46:37,671 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:46:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:37,992 INFO L93 Difference]: Finished difference Result 369 states and 902 transitions. [2020-10-11 12:46:37,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:46:37,993 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:37,994 INFO L225 Difference]: With dead ends: 369 [2020-10-11 12:46:37,994 INFO L226 Difference]: Without dead ends: 364 [2020-10-11 12:46:37,994 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-11 12:46:37,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-11 12:46:37,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 272. [2020-10-11 12:46:37,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-11 12:46:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-11 12:46:37,999 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-11 12:46:38,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:38,000 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-11 12:46:38,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:38,000 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-11 12:46:38,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:38,000 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:38,000 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:38,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-11 12:46:38,201 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:38,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:38,202 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-10-11 12:46:38,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:38,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051450747] [2020-10-11 12:46:38,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:38,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051450747] [2020-10-11 12:46:38,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478494844] [2020-10-11 12:46:38,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:38,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:46:38,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:38,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:38,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:38,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:38,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:38,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239689425] [2020-10-11 12:46:38,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:38,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:38,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:38,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:38,577 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-11 12:46:38,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:38,970 INFO L93 Difference]: Finished difference Result 352 states and 862 transitions. [2020-10-11 12:46:38,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:46:38,971 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:38,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:38,971 INFO L225 Difference]: With dead ends: 352 [2020-10-11 12:46:38,972 INFO L226 Difference]: Without dead ends: 348 [2020-10-11 12:46:38,972 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:46:38,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-11 12:46:38,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 268. [2020-10-11 12:46:38,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-11 12:46:38,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-10-11 12:46:38,976 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-10-11 12:46:38,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:38,976 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-10-11 12:46:38,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:38,976 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-10-11 12:46:38,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:38,976 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:38,976 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:39,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:39,177 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:39,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:39,178 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-10-11 12:46:39,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:39,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084682246] [2020-10-11 12:46:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:39,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084682246] [2020-10-11 12:46:39,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522240306] [2020-10-11 12:46:39,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:39,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:46:39,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:39,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:39,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:39,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:39,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:39,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981507793] [2020-10-11 12:46:39,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:39,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:39,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:39,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:39,489 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-10-11 12:46:39,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:39,887 INFO L93 Difference]: Finished difference Result 330 states and 806 transitions. [2020-10-11 12:46:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:46:39,887 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:39,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:39,888 INFO L225 Difference]: With dead ends: 330 [2020-10-11 12:46:39,888 INFO L226 Difference]: Without dead ends: 327 [2020-10-11 12:46:39,888 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:46:39,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-11 12:46:39,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2020-10-11 12:46:39,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-11 12:46:39,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-10-11 12:46:39,893 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-10-11 12:46:39,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:39,893 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-10-11 12:46:39,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:39,893 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-10-11 12:46:39,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:39,894 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:39,894 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:40,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:40,103 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:40,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:40,103 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-10-11 12:46:40,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:40,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591037620] [2020-10-11 12:46:40,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:40,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591037620] [2020-10-11 12:46:40,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312892821] [2020-10-11 12:46:40,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:40,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:46:40,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:40,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:40,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:40,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:40,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:40,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555648938] [2020-10-11 12:46:40,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:40,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:40,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:40,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:40,479 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-10-11 12:46:40,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:40,909 INFO L93 Difference]: Finished difference Result 365 states and 887 transitions. [2020-10-11 12:46:40,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:46:40,910 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:40,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:40,910 INFO L225 Difference]: With dead ends: 365 [2020-10-11 12:46:40,910 INFO L226 Difference]: Without dead ends: 360 [2020-10-11 12:46:40,911 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:46:40,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-11 12:46:40,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 272. [2020-10-11 12:46:40,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-11 12:46:40,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-11 12:46:40,915 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-11 12:46:40,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:40,915 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-11 12:46:40,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:40,915 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-11 12:46:40,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:40,915 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:40,916 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:41,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:41,116 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:41,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:41,117 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-10-11 12:46:41,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:41,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12038374] [2020-10-11 12:46:41,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:41,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12038374] [2020-10-11 12:46:41,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728590903] [2020-10-11 12:46:41,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:41,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:46:41,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:41,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:41,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:41,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:41,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:41,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453236474] [2020-10-11 12:46:41,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:41,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:41,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:41,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:41,404 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-11 12:46:41,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:41,754 INFO L93 Difference]: Finished difference Result 363 states and 882 transitions. [2020-10-11 12:46:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:46:41,755 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:41,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:41,755 INFO L225 Difference]: With dead ends: 363 [2020-10-11 12:46:41,755 INFO L226 Difference]: Without dead ends: 358 [2020-10-11 12:46:41,755 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:46:41,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-11 12:46:41,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 271. [2020-10-11 12:46:41,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-11 12:46:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-10-11 12:46:41,759 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-10-11 12:46:41,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:41,759 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-10-11 12:46:41,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:41,760 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-10-11 12:46:41,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:41,760 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:41,760 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:41,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-11 12:46:41,962 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:41,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:41,963 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-10-11 12:46:41,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:41,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937617835] [2020-10-11 12:46:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:42,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937617835] [2020-10-11 12:46:42,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437252010] [2020-10-11 12:46:42,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:42,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:46:42,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:42,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:42,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:42,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:42,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:42,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:42,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456489069] [2020-10-11 12:46:42,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:42,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:42,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:42,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:42,259 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-10-11 12:46:42,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:42,546 INFO L93 Difference]: Finished difference Result 333 states and 812 transitions. [2020-10-11 12:46:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:46:42,547 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:42,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:42,547 INFO L225 Difference]: With dead ends: 333 [2020-10-11 12:46:42,547 INFO L226 Difference]: Without dead ends: 315 [2020-10-11 12:46:42,548 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:46:42,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-11 12:46:42,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 266. [2020-10-11 12:46:42,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-11 12:46:42,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-11 12:46:42,552 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-11 12:46:42,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:42,552 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-11 12:46:42,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:42,552 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-11 12:46:42,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:42,552 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:42,552 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:42,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-11 12:46:42,753 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:42,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:42,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-10-11 12:46:42,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:42,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977595027] [2020-10-11 12:46:42,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:42,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977595027] [2020-10-11 12:46:42,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092418201] [2020-10-11 12:46:42,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:42,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:42,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:43,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:43,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:43,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222102804] [2020-10-11 12:46:43,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:43,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:43,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:43,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:43,109 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-11 12:46:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:43,204 INFO L93 Difference]: Finished difference Result 296 states and 732 transitions. [2020-10-11 12:46:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:46:43,205 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:43,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:43,206 INFO L225 Difference]: With dead ends: 296 [2020-10-11 12:46:43,206 INFO L226 Difference]: Without dead ends: 294 [2020-10-11 12:46:43,207 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:46:43,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-11 12:46:43,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 270. [2020-10-11 12:46:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-11 12:46:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 695 transitions. [2020-10-11 12:46:43,212 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 695 transitions. Word has length 14 [2020-10-11 12:46:43,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:43,212 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 695 transitions. [2020-10-11 12:46:43,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:43,212 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 695 transitions. [2020-10-11 12:46:43,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:43,213 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:43,213 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:43,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-11 12:46:43,425 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:43,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:43,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-10-11 12:46:43,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:43,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724548100] [2020-10-11 12:46:43,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:43,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724548100] [2020-10-11 12:46:43,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012663333] [2020-10-11 12:46:43,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:43,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:46:43,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:43,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:43,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:43,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:43,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:43,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24488313] [2020-10-11 12:46:43,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:43,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:43,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:43,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:43,768 INFO L87 Difference]: Start difference. First operand 270 states and 695 transitions. Second operand 17 states. [2020-10-11 12:46:44,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:44,172 INFO L93 Difference]: Finished difference Result 328 states and 803 transitions. [2020-10-11 12:46:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:46:44,174 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:44,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:44,175 INFO L225 Difference]: With dead ends: 328 [2020-10-11 12:46:44,175 INFO L226 Difference]: Without dead ends: 325 [2020-10-11 12:46:44,175 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:46:44,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-11 12:46:44,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 268. [2020-10-11 12:46:44,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-11 12:46:44,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-11 12:46:44,182 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-11 12:46:44,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:44,183 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-11 12:46:44,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:44,183 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-11 12:46:44,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:44,184 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:44,184 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:44,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-11 12:46:44,385 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:44,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:44,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-10-11 12:46:44,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:44,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023336880] [2020-10-11 12:46:44,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:44,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023336880] [2020-10-11 12:46:44,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470310994] [2020-10-11 12:46:44,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:44,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:46:44,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:44,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:44,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:44,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:44,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:44,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122031541] [2020-10-11 12:46:44,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:44,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:44,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:44,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:44,762 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-11 12:46:45,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:45,093 INFO L93 Difference]: Finished difference Result 344 states and 841 transitions. [2020-10-11 12:46:45,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:46:45,094 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:45,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:45,095 INFO L225 Difference]: With dead ends: 344 [2020-10-11 12:46:45,095 INFO L226 Difference]: Without dead ends: 340 [2020-10-11 12:46:45,095 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:46:45,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-11 12:46:45,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 266. [2020-10-11 12:46:45,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-11 12:46:45,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-11 12:46:45,101 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-11 12:46:45,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:45,102 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-11 12:46:45,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:45,102 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-11 12:46:45,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:45,102 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:45,102 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:45,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-11 12:46:45,312 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:45,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-10-11 12:46:45,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:45,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651131741] [2020-10-11 12:46:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:45,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651131741] [2020-10-11 12:46:45,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973237593] [2020-10-11 12:46:45,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:45,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:46:45,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:45,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:45,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:47,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:47,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:47,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:47,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335639326] [2020-10-11 12:46:47,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:47,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:47,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:47,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:47,038 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-11 12:46:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:47,446 INFO L93 Difference]: Finished difference Result 331 states and 805 transitions. [2020-10-11 12:46:47,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:46:47,447 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:47,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:47,447 INFO L225 Difference]: With dead ends: 331 [2020-10-11 12:46:47,448 INFO L226 Difference]: Without dead ends: 328 [2020-10-11 12:46:47,448 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:46:47,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-11 12:46:47,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 268. [2020-10-11 12:46:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-11 12:46:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-11 12:46:47,452 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-11 12:46:47,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:47,452 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-11 12:46:47,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:47,452 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-11 12:46:47,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:47,453 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:47,453 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:47,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-11 12:46:47,662 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:47,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:47,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-10-11 12:46:47,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:47,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907104575] [2020-10-11 12:46:47,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:47,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907104575] [2020-10-11 12:46:47,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726423566] [2020-10-11 12:46:47,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:47,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:46:47,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:47,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:47,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:50,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:50,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:50,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597739392] [2020-10-11 12:46:50,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:50,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:50,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:50,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:46:50,630 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-11 12:46:54,904 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:46:55,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:55,226 INFO L93 Difference]: Finished difference Result 357 states and 866 transitions. [2020-10-11 12:46:55,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:46:55,227 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:55,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:55,227 INFO L225 Difference]: With dead ends: 357 [2020-10-11 12:46:55,227 INFO L226 Difference]: Without dead ends: 352 [2020-10-11 12:46:55,227 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-10-11 12:46:55,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-11 12:46:55,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 268. [2020-10-11 12:46:55,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-11 12:46:55,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-11 12:46:55,231 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-11 12:46:55,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:55,232 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-11 12:46:55,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:55,232 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-11 12:46:55,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:55,232 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:55,232 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:55,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:55,433 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:55,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:55,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-10-11 12:46:55,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:55,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346029567] [2020-10-11 12:46:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:55,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346029567] [2020-10-11 12:46:55,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803580400] [2020-10-11 12:46:55,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:55,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:46:55,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:55,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:55,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:55,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:55,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:55,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854284581] [2020-10-11 12:46:55,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:55,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:55,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:55,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:55,799 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-11 12:46:56,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:56,242 INFO L93 Difference]: Finished difference Result 339 states and 826 transitions. [2020-10-11 12:46:56,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:46:56,243 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:56,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:56,244 INFO L225 Difference]: With dead ends: 339 [2020-10-11 12:46:56,244 INFO L226 Difference]: Without dead ends: 335 [2020-10-11 12:46:56,244 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:46:56,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-11 12:46:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 264. [2020-10-11 12:46:56,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-11 12:46:56,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 677 transitions. [2020-10-11 12:46:56,247 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 677 transitions. Word has length 14 [2020-10-11 12:46:56,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:56,248 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 677 transitions. [2020-10-11 12:46:56,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:56,248 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 677 transitions. [2020-10-11 12:46:56,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:56,248 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:56,248 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:56,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:56,449 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:56,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:56,449 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-10-11 12:46:56,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:56,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790897311] [2020-10-11 12:46:56,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:56,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790897311] [2020-10-11 12:46:56,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678697674] [2020-10-11 12:46:56,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:56,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:56,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:56,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:56,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:56,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830827066] [2020-10-11 12:46:56,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:56,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:56,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:56,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:56,780 INFO L87 Difference]: Start difference. First operand 264 states and 677 transitions. Second operand 17 states. [2020-10-11 12:46:56,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:56,914 INFO L93 Difference]: Finished difference Result 287 states and 713 transitions. [2020-10-11 12:46:56,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:46:56,915 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:56,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:56,916 INFO L225 Difference]: With dead ends: 287 [2020-10-11 12:46:56,916 INFO L226 Difference]: Without dead ends: 285 [2020-10-11 12:46:56,916 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:46:56,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-11 12:46:56,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 266. [2020-10-11 12:46:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-11 12:46:56,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-11 12:46:56,920 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-11 12:46:56,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:56,920 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-11 12:46:56,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:56,920 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-11 12:46:56,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:56,920 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:56,921 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:57,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:57,121 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:57,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:57,122 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-10-11 12:46:57,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:57,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697596069] [2020-10-11 12:46:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:57,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697596069] [2020-10-11 12:46:57,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725468104] [2020-10-11 12:46:57,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:57,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:46:57,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:57,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:57,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:57,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:57,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:57,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350142929] [2020-10-11 12:46:57,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:57,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:57,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:57,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:57,445 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-11 12:46:57,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:57,759 INFO L93 Difference]: Finished difference Result 317 states and 778 transitions. [2020-10-11 12:46:57,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:46:57,760 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:57,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:57,760 INFO L225 Difference]: With dead ends: 317 [2020-10-11 12:46:57,761 INFO L226 Difference]: Without dead ends: 314 [2020-10-11 12:46:57,761 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:46:57,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-11 12:46:57,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 264. [2020-10-11 12:46:57,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-11 12:46:57,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 677 transitions. [2020-10-11 12:46:57,765 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 677 transitions. Word has length 14 [2020-10-11 12:46:57,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:57,765 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 677 transitions. [2020-10-11 12:46:57,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:57,765 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 677 transitions. [2020-10-11 12:46:57,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:57,765 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:57,765 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:57,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:57,966 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:57,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:57,967 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-10-11 12:46:57,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:57,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027010176] [2020-10-11 12:46:57,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:58,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027010176] [2020-10-11 12:46:58,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544976783] [2020-10-11 12:46:58,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:58,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:46:58,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:58,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 12:46:58,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:58,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:58,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-10-11 12:46:58,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191245233] [2020-10-11 12:46:58,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 12:46:58,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:58,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 12:46:58,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-11 12:46:58,189 INFO L87 Difference]: Start difference. First operand 264 states and 677 transitions. Second operand 14 states. [2020-10-11 12:46:58,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:58,482 INFO L93 Difference]: Finished difference Result 337 states and 817 transitions. [2020-10-11 12:46:58,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:46:58,483 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2020-10-11 12:46:58,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:58,483 INFO L225 Difference]: With dead ends: 337 [2020-10-11 12:46:58,484 INFO L226 Difference]: Without dead ends: 330 [2020-10-11 12:46:58,484 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:46:58,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-11 12:46:58,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 262. [2020-10-11 12:46:58,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-11 12:46:58,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 671 transitions. [2020-10-11 12:46:58,488 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 671 transitions. Word has length 14 [2020-10-11 12:46:58,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:58,488 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 671 transitions. [2020-10-11 12:46:58,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 12:46:58,488 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 671 transitions. [2020-10-11 12:46:58,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:58,489 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:58,489 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:58,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:58,690 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:58,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:58,690 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-10-11 12:46:58,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:58,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899207126] [2020-10-11 12:46:58,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:58,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899207126] [2020-10-11 12:46:58,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929510286] [2020-10-11 12:46:58,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:58,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:46:58,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:58,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:58,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:59,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:59,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:59,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913033780] [2020-10-11 12:46:59,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:59,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:59,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:59,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:59,021 INFO L87 Difference]: Start difference. First operand 262 states and 671 transitions. Second operand 17 states. [2020-10-11 12:46:59,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:59,194 INFO L93 Difference]: Finished difference Result 278 states and 694 transitions. [2020-10-11 12:46:59,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:46:59,195 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:46:59,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:59,195 INFO L225 Difference]: With dead ends: 278 [2020-10-11 12:46:59,195 INFO L226 Difference]: Without dead ends: 276 [2020-10-11 12:46:59,196 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:46:59,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-11 12:46:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 262. [2020-10-11 12:46:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-11 12:46:59,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 671 transitions. [2020-10-11 12:46:59,199 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 671 transitions. Word has length 14 [2020-10-11 12:46:59,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:59,199 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 671 transitions. [2020-10-11 12:46:59,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:46:59,200 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 671 transitions. [2020-10-11 12:46:59,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:46:59,200 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:59,200 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:46:59,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:59,401 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:46:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:59,401 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 149 times [2020-10-11 12:46:59,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:59,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869625838] [2020-10-11 12:46:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:59,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869625838] [2020-10-11 12:46:59,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443107928] [2020-10-11 12:46:59,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:59,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:46:59,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:59,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:46:59,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:46:59,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:59,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:46:59,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9706988] [2020-10-11 12:46:59,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:46:59,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:59,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:46:59,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:46:59,723 INFO L87 Difference]: Start difference. First operand 262 states and 671 transitions. Second operand 17 states. [2020-10-11 12:47:00,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:00,059 INFO L93 Difference]: Finished difference Result 306 states and 753 transitions. [2020-10-11 12:47:00,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:47:00,060 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:00,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:00,061 INFO L225 Difference]: With dead ends: 306 [2020-10-11 12:47:00,061 INFO L226 Difference]: Without dead ends: 303 [2020-10-11 12:47:00,061 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:47:00,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-11 12:47:00,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 260. [2020-10-11 12:47:00,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-11 12:47:00,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 665 transitions. [2020-10-11 12:47:00,066 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 665 transitions. Word has length 14 [2020-10-11 12:47:00,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:00,066 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 665 transitions. [2020-10-11 12:47:00,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:00,066 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 665 transitions. [2020-10-11 12:47:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:00,066 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:00,066 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:00,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-11 12:47:00,267 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:00,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:00,268 INFO L82 PathProgramCache]: Analyzing trace with hash -770999714, now seen corresponding path program 150 times [2020-10-11 12:47:00,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:00,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516249359] [2020-10-11 12:47:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:00,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516249359] [2020-10-11 12:47:00,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436703176] [2020-10-11 12:47:00,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:00,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:47:00,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:00,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 12:47:00,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:00,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:00,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 12:47:00,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821998606] [2020-10-11 12:47:00,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:47:00,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:00,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:47:00,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:47:00,463 INFO L87 Difference]: Start difference. First operand 260 states and 665 transitions. Second operand 11 states. [2020-10-11 12:47:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:00,615 INFO L93 Difference]: Finished difference Result 269 states and 677 transitions. [2020-10-11 12:47:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:47:00,616 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 12:47:00,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:00,617 INFO L225 Difference]: With dead ends: 269 [2020-10-11 12:47:00,617 INFO L226 Difference]: Without dead ends: 267 [2020-10-11 12:47:00,617 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:47:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-11 12:47:00,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2020-10-11 12:47:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-11 12:47:00,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 659 transitions. [2020-10-11 12:47:00,621 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 659 transitions. Word has length 14 [2020-10-11 12:47:00,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:00,621 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 659 transitions. [2020-10-11 12:47:00,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:47:00,621 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 659 transitions. [2020-10-11 12:47:00,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:00,621 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:00,622 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:00,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:00,822 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:00,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:00,823 INFO L82 PathProgramCache]: Analyzing trace with hash -770977394, now seen corresponding path program 151 times [2020-10-11 12:47:00,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:00,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955409953] [2020-10-11 12:47:00,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:00,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955409953] [2020-10-11 12:47:00,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15262476] [2020-10-11 12:47:00,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:00,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:00,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:01,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:47:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:01,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:01,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:01,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213430117] [2020-10-11 12:47:01,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:01,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:01,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:01,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:01,153 INFO L87 Difference]: Start difference. First operand 256 states and 659 transitions. Second operand 17 states. [2020-10-11 12:47:01,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:01,642 INFO L93 Difference]: Finished difference Result 298 states and 754 transitions. [2020-10-11 12:47:01,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:47:01,643 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:01,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:01,644 INFO L225 Difference]: With dead ends: 298 [2020-10-11 12:47:01,644 INFO L226 Difference]: Without dead ends: 294 [2020-10-11 12:47:01,645 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:47:01,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-11 12:47:01,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 257. [2020-10-11 12:47:01,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-11 12:47:01,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 662 transitions. [2020-10-11 12:47:01,650 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 662 transitions. Word has length 14 [2020-10-11 12:47:01,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:01,650 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 662 transitions. [2020-10-11 12:47:01,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:01,650 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 662 transitions. [2020-10-11 12:47:01,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:01,650 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:01,651 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:01,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-11 12:47:01,857 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:01,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:01,858 INFO L82 PathProgramCache]: Analyzing trace with hash -770969923, now seen corresponding path program 152 times [2020-10-11 12:47:01,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:01,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772917752] [2020-10-11 12:47:01,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:01,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772917752] [2020-10-11 12:47:01,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979844984] [2020-10-11 12:47:01,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:01,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:47:01,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:01,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:01,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:02,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:02,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:02,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929117364] [2020-10-11 12:47:02,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:02,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:02,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:02,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:02,173 INFO L87 Difference]: Start difference. First operand 257 states and 662 transitions. Second operand 17 states. [2020-10-11 12:47:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:02,563 INFO L93 Difference]: Finished difference Result 313 states and 786 transitions. [2020-10-11 12:47:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:47:02,564 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:02,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:02,564 INFO L225 Difference]: With dead ends: 313 [2020-10-11 12:47:02,565 INFO L226 Difference]: Without dead ends: 310 [2020-10-11 12:47:02,565 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:47:02,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-11 12:47:02,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 259. [2020-10-11 12:47:02,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-11 12:47:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 669 transitions. [2020-10-11 12:47:02,569 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 669 transitions. Word has length 14 [2020-10-11 12:47:02,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:02,569 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 669 transitions. [2020-10-11 12:47:02,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:02,569 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 669 transitions. [2020-10-11 12:47:02,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:02,569 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:02,569 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:02,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:02,770 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:02,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:02,771 INFO L82 PathProgramCache]: Analyzing trace with hash -770948564, now seen corresponding path program 153 times [2020-10-11 12:47:02,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:02,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70192859] [2020-10-11 12:47:02,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:02,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:02,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70192859] [2020-10-11 12:47:02,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582463062] [2020-10-11 12:47:02,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:02,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:47:02,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:02,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:47:02,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:03,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:47:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:03,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:03,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:03,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068892742] [2020-10-11 12:47:03,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:03,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:03,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:03,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:03,088 INFO L87 Difference]: Start difference. First operand 259 states and 669 transitions. Second operand 17 states. [2020-10-11 12:47:03,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:03,660 INFO L93 Difference]: Finished difference Result 314 states and 795 transitions. [2020-10-11 12:47:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:47:03,661 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:03,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:03,662 INFO L225 Difference]: With dead ends: 314 [2020-10-11 12:47:03,662 INFO L226 Difference]: Without dead ends: 309 [2020-10-11 12:47:03,662 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=597, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:47:03,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-11 12:47:03,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 259. [2020-10-11 12:47:03,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-11 12:47:03,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 668 transitions. [2020-10-11 12:47:03,666 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 668 transitions. Word has length 14 [2020-10-11 12:47:03,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:03,666 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 668 transitions. [2020-10-11 12:47:03,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:03,666 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 668 transitions. [2020-10-11 12:47:03,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:03,666 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:03,667 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:03,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:03,869 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:03,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:03,869 INFO L82 PathProgramCache]: Analyzing trace with hash -770947603, now seen corresponding path program 154 times [2020-10-11 12:47:03,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:03,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609887977] [2020-10-11 12:47:03,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:03,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609887977] [2020-10-11 12:47:03,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370358411] [2020-10-11 12:47:03,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:04,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:47:04,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:04,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:04,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:04,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:47:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:04,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:04,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:04,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396981337] [2020-10-11 12:47:04,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:04,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:04,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:04,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:04,208 INFO L87 Difference]: Start difference. First operand 259 states and 668 transitions. Second operand 17 states. [2020-10-11 12:47:04,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:04,730 INFO L93 Difference]: Finished difference Result 333 states and 837 transitions. [2020-10-11 12:47:04,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:47:04,731 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:04,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:04,732 INFO L225 Difference]: With dead ends: 333 [2020-10-11 12:47:04,732 INFO L226 Difference]: Without dead ends: 328 [2020-10-11 12:47:04,732 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:47:04,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-11 12:47:04,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 259. [2020-10-11 12:47:04,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-11 12:47:04,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 671 transitions. [2020-10-11 12:47:04,736 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 671 transitions. Word has length 14 [2020-10-11 12:47:04,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:04,736 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 671 transitions. [2020-10-11 12:47:04,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:04,736 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 671 transitions. [2020-10-11 12:47:04,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:04,737 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:04,737 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:04,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-10-11 12:47:04,946 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:04,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:04,946 INFO L82 PathProgramCache]: Analyzing trace with hash -770739283, now seen corresponding path program 155 times [2020-10-11 12:47:04,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:04,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912219965] [2020-10-11 12:47:04,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:05,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912219965] [2020-10-11 12:47:05,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204507058] [2020-10-11 12:47:05,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:05,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:47:05,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:05,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:05,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:05,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:05,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:05,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787608363] [2020-10-11 12:47:05,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:05,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:05,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:05,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:05,292 INFO L87 Difference]: Start difference. First operand 259 states and 671 transitions. Second operand 17 states. [2020-10-11 12:47:05,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:05,707 INFO L93 Difference]: Finished difference Result 350 states and 873 transitions. [2020-10-11 12:47:05,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:47:05,708 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:05,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:05,708 INFO L225 Difference]: With dead ends: 350 [2020-10-11 12:47:05,708 INFO L226 Difference]: Without dead ends: 346 [2020-10-11 12:47:05,708 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:47:05,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-11 12:47:05,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 261. [2020-10-11 12:47:05,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-11 12:47:05,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 678 transitions. [2020-10-11 12:47:05,712 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 678 transitions. Word has length 14 [2020-10-11 12:47:05,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:05,713 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 678 transitions. [2020-10-11 12:47:05,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:05,713 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 678 transitions. [2020-10-11 12:47:05,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:05,713 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:05,713 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:05,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:05,914 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:05,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:05,915 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 156 times [2020-10-11 12:47:05,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:05,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146852587] [2020-10-11 12:47:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:06,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146852587] [2020-10-11 12:47:06,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470052123] [2020-10-11 12:47:06,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:06,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:47:06,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:06,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:06,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:06,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:06,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:06,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718845764] [2020-10-11 12:47:06,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:06,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:06,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:06,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:06,259 INFO L87 Difference]: Start difference. First operand 261 states and 678 transitions. Second operand 17 states. [2020-10-11 12:47:06,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:06,803 INFO L93 Difference]: Finished difference Result 362 states and 911 transitions. [2020-10-11 12:47:06,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:47:06,804 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:06,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:06,805 INFO L225 Difference]: With dead ends: 362 [2020-10-11 12:47:06,805 INFO L226 Difference]: Without dead ends: 358 [2020-10-11 12:47:06,805 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:47:06,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-11 12:47:06,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 265. [2020-10-11 12:47:06,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-11 12:47:06,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 692 transitions. [2020-10-11 12:47:06,809 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 692 transitions. Word has length 14 [2020-10-11 12:47:06,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:06,809 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 692 transitions. [2020-10-11 12:47:06,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:06,809 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 692 transitions. [2020-10-11 12:47:06,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:06,810 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:06,810 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:07,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:07,010 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:07,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:07,011 INFO L82 PathProgramCache]: Analyzing trace with hash -770054834, now seen corresponding path program 157 times [2020-10-11 12:47:07,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:07,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139479213] [2020-10-11 12:47:07,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:07,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139479213] [2020-10-11 12:47:07,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029780817] [2020-10-11 12:47:07,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:07,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:07,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:07,314 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:47:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:07,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:07,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:07,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327625963] [2020-10-11 12:47:07,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:07,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:07,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:07,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:07,355 INFO L87 Difference]: Start difference. First operand 265 states and 692 transitions. Second operand 17 states. [2020-10-11 12:47:08,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:08,057 INFO L93 Difference]: Finished difference Result 322 states and 822 transitions. [2020-10-11 12:47:08,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:47:08,057 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:08,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:08,058 INFO L225 Difference]: With dead ends: 322 [2020-10-11 12:47:08,058 INFO L226 Difference]: Without dead ends: 316 [2020-10-11 12:47:08,058 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=358, Invalid=698, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:47:08,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-11 12:47:08,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 265. [2020-10-11 12:47:08,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-11 12:47:08,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 690 transitions. [2020-10-11 12:47:08,062 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 690 transitions. Word has length 14 [2020-10-11 12:47:08,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:08,063 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 690 transitions. [2020-10-11 12:47:08,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:08,063 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 690 transitions. [2020-10-11 12:47:08,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:08,063 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:08,063 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:08,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:08,264 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:08,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:08,264 INFO L82 PathProgramCache]: Analyzing trace with hash -770053873, now seen corresponding path program 158 times [2020-10-11 12:47:08,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:08,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789129330] [2020-10-11 12:47:08,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:08,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789129330] [2020-10-11 12:47:08,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588057096] [2020-10-11 12:47:08,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:08,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:47:08,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:08,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:08,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:10,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:47:10,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:10,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:10,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:10,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918457182] [2020-10-11 12:47:10,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:10,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:10,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:10,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:47:10,680 INFO L87 Difference]: Start difference. First operand 265 states and 690 transitions. Second operand 17 states. [2020-10-11 12:47:14,953 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-11 12:47:15,239 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-11 12:47:19,365 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-11 12:47:19,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:19,887 INFO L93 Difference]: Finished difference Result 395 states and 997 transitions. [2020-10-11 12:47:19,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:47:19,887 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:19,888 INFO L225 Difference]: With dead ends: 395 [2020-10-11 12:47:19,888 INFO L226 Difference]: Without dead ends: 386 [2020-10-11 12:47:19,889 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-10-11 12:47:19,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-10-11 12:47:19,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 262. [2020-10-11 12:47:19,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-11 12:47:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 685 transitions. [2020-10-11 12:47:19,892 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 685 transitions. Word has length 14 [2020-10-11 12:47:19,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:19,893 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 685 transitions. [2020-10-11 12:47:19,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:19,893 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 685 transitions. [2020-10-11 12:47:19,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:19,893 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:19,893 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:20,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:20,095 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:20,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:20,096 INFO L82 PathProgramCache]: Analyzing trace with hash -770025043, now seen corresponding path program 159 times [2020-10-11 12:47:20,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:20,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078332387] [2020-10-11 12:47:20,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:20,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078332387] [2020-10-11 12:47:20,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595072197] [2020-10-11 12:47:20,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:20,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:47:20,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:20,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:20,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:20,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:47:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:20,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:20,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:20,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832365404] [2020-10-11 12:47:20,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:20,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:20,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:20,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:20,441 INFO L87 Difference]: Start difference. First operand 262 states and 685 transitions. Second operand 17 states. [2020-10-11 12:47:21,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:21,111 INFO L93 Difference]: Finished difference Result 358 states and 909 transitions. [2020-10-11 12:47:21,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:47:21,112 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:21,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:21,113 INFO L225 Difference]: With dead ends: 358 [2020-10-11 12:47:21,113 INFO L226 Difference]: Without dead ends: 353 [2020-10-11 12:47:21,114 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:47:21,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-11 12:47:21,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 262. [2020-10-11 12:47:21,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-11 12:47:21,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 685 transitions. [2020-10-11 12:47:21,117 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 685 transitions. Word has length 14 [2020-10-11 12:47:21,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:21,118 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 685 transitions. [2020-10-11 12:47:21,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:21,118 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 685 transitions. [2020-10-11 12:47:21,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:21,118 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:21,118 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:21,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:21,319 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:21,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:21,319 INFO L82 PathProgramCache]: Analyzing trace with hash -763589443, now seen corresponding path program 160 times [2020-10-11 12:47:21,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:21,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000026637] [2020-10-11 12:47:21,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:21,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000026637] [2020-10-11 12:47:21,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434168181] [2020-10-11 12:47:21,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:21,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:47:21,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:21,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:21,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:21,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:21,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:21,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127779774] [2020-10-11 12:47:21,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:21,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:21,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:21,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:21,674 INFO L87 Difference]: Start difference. First operand 262 states and 685 transitions. Second operand 17 states. [2020-10-11 12:47:22,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:22,094 INFO L93 Difference]: Finished difference Result 350 states and 871 transitions. [2020-10-11 12:47:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:47:22,095 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:22,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:22,096 INFO L225 Difference]: With dead ends: 350 [2020-10-11 12:47:22,096 INFO L226 Difference]: Without dead ends: 347 [2020-10-11 12:47:22,096 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:47:22,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-11 12:47:22,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 265. [2020-10-11 12:47:22,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-11 12:47:22,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 696 transitions. [2020-10-11 12:47:22,099 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 696 transitions. Word has length 14 [2020-10-11 12:47:22,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:22,100 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 696 transitions. [2020-10-11 12:47:22,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:22,100 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 696 transitions. [2020-10-11 12:47:22,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:22,100 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:22,100 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:22,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:22,301 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:22,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:22,301 INFO L82 PathProgramCache]: Analyzing trace with hash -763588482, now seen corresponding path program 161 times [2020-10-11 12:47:22,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:22,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274011512] [2020-10-11 12:47:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:22,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:22,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274011512] [2020-10-11 12:47:22,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056624216] [2020-10-11 12:47:22,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:22,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:47:22,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:22,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:22,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:26,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:26,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:26,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656679262] [2020-10-11 12:47:26,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:26,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:26,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:26,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:47:26,623 INFO L87 Difference]: Start difference. First operand 265 states and 696 transitions. Second operand 17 states. [2020-10-11 12:47:30,920 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:47:37,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:37,315 INFO L93 Difference]: Finished difference Result 380 states and 945 transitions. [2020-10-11 12:47:37,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:47:37,316 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:37,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:37,317 INFO L225 Difference]: With dead ends: 380 [2020-10-11 12:47:37,317 INFO L226 Difference]: Without dead ends: 375 [2020-10-11 12:47:37,317 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=193, Invalid=508, Unknown=1, NotChecked=0, Total=702 [2020-10-11 12:47:37,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-11 12:47:37,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 266. [2020-10-11 12:47:37,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-11 12:47:37,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 698 transitions. [2020-10-11 12:47:37,322 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 698 transitions. Word has length 14 [2020-10-11 12:47:37,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:37,322 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 698 transitions. [2020-10-11 12:47:37,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 698 transitions. [2020-10-11 12:47:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:37,323 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:37,323 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:37,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-11 12:47:37,524 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:37,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:37,524 INFO L82 PathProgramCache]: Analyzing trace with hash -763559652, now seen corresponding path program 162 times [2020-10-11 12:47:37,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:37,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021119548] [2020-10-11 12:47:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:37,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021119548] [2020-10-11 12:47:37,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70880778] [2020-10-11 12:47:37,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:47:37,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:47:37,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:37,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:37,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:37,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:37,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:37,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007150795] [2020-10-11 12:47:37,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:37,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:37,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:37,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:37,902 INFO L87 Difference]: Start difference. First operand 266 states and 698 transitions. Second operand 17 states. [2020-10-11 12:47:38,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:38,376 INFO L93 Difference]: Finished difference Result 366 states and 912 transitions. [2020-10-11 12:47:38,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:47:38,377 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:38,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:38,378 INFO L225 Difference]: With dead ends: 366 [2020-10-11 12:47:38,378 INFO L226 Difference]: Without dead ends: 362 [2020-10-11 12:47:38,378 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:47:38,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-11 12:47:38,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 264. [2020-10-11 12:47:38,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-11 12:47:38,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 692 transitions. [2020-10-11 12:47:38,382 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 692 transitions. Word has length 14 [2020-10-11 12:47:38,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:38,382 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 692 transitions. [2020-10-11 12:47:38,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:38,382 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 692 transitions. [2020-10-11 12:47:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:38,383 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:38,383 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:38,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-10-11 12:47:38,586 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:38,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:38,587 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 163 times [2020-10-11 12:47:38,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:38,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103807999] [2020-10-11 12:47:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:38,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103807999] [2020-10-11 12:47:38,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60614328] [2020-10-11 12:47:38,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:47:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:38,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:38,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:40,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:40,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:40,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566854809] [2020-10-11 12:47:40,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:40,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:40,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:40,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:40,188 INFO L87 Difference]: Start difference. First operand 264 states and 692 transitions. Second operand 17 states. [2020-10-11 12:47:40,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:40,866 INFO L93 Difference]: Finished difference Result 357 states and 890 transitions. [2020-10-11 12:47:40,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:47:40,867 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:40,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:40,868 INFO L225 Difference]: With dead ends: 357 [2020-10-11 12:47:40,868 INFO L226 Difference]: Without dead ends: 354 [2020-10-11 12:47:40,868 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:47:40,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-11 12:47:40,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 266. [2020-10-11 12:47:40,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-11 12:47:40,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 700 transitions. [2020-10-11 12:47:40,872 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 700 transitions. Word has length 14 [2020-10-11 12:47:40,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:40,873 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 700 transitions. [2020-10-11 12:47:40,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:40,873 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 700 transitions. [2020-10-11 12:47:40,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:40,873 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:40,873 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:41,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-10-11 12:47:41,077 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:41,078 INFO L82 PathProgramCache]: Analyzing trace with hash -743032692, now seen corresponding path program 164 times [2020-10-11 12:47:41,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:41,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582915778] [2020-10-11 12:47:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:41,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582915778] [2020-10-11 12:47:41,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490705480] [2020-10-11 12:47:41,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:47:41,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:47:41,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:41,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:41,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:42,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:42,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:42,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810900121] [2020-10-11 12:47:42,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:42,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:42,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:42,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:42,362 INFO L87 Difference]: Start difference. First operand 266 states and 700 transitions. Second operand 17 states. [2020-10-11 12:47:46,722 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:48:01,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:01,414 INFO L93 Difference]: Finished difference Result 401 states and 995 transitions. [2020-10-11 12:48:01,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:48:01,415 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:01,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:01,416 INFO L225 Difference]: With dead ends: 401 [2020-10-11 12:48:01,416 INFO L226 Difference]: Without dead ends: 396 [2020-10-11 12:48:01,416 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=289, Invalid=699, Unknown=4, NotChecked=0, Total=992 [2020-10-11 12:48:01,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-11 12:48:01,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 269. [2020-10-11 12:48:01,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-11 12:48:01,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 709 transitions. [2020-10-11 12:48:01,420 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 709 transitions. Word has length 14 [2020-10-11 12:48:01,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:01,420 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 709 transitions. [2020-10-11 12:48:01,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:01,420 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 709 transitions. [2020-10-11 12:48:01,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:01,420 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:01,421 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:01,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:01,621 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:01,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:01,622 INFO L82 PathProgramCache]: Analyzing trace with hash -742370563, now seen corresponding path program 165 times [2020-10-11 12:48:01,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:01,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048518830] [2020-10-11 12:48:01,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:01,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048518830] [2020-10-11 12:48:01,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005316911] [2020-10-11 12:48:01,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:48:01,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:48:01,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:01,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:01,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:01,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:01,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:01,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990768399] [2020-10-11 12:48:01,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:01,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:01,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:01,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:01,992 INFO L87 Difference]: Start difference. First operand 269 states and 709 transitions. Second operand 17 states. [2020-10-11 12:48:02,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:02,688 INFO L93 Difference]: Finished difference Result 352 states and 890 transitions. [2020-10-11 12:48:02,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 12:48:02,689 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:02,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:02,690 INFO L225 Difference]: With dead ends: 352 [2020-10-11 12:48:02,690 INFO L226 Difference]: Without dead ends: 349 [2020-10-11 12:48:02,690 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:48:02,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-11 12:48:02,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 271. [2020-10-11 12:48:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-11 12:48:02,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 716 transitions. [2020-10-11 12:48:02,693 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 716 transitions. Word has length 14 [2020-10-11 12:48:02,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:02,693 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 716 transitions. [2020-10-11 12:48:02,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:02,694 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 716 transitions. [2020-10-11 12:48:02,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:02,694 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:02,694 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:02,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:02,895 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:02,895 INFO L82 PathProgramCache]: Analyzing trace with hash -742349204, now seen corresponding path program 166 times [2020-10-11 12:48:02,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:02,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544308043] [2020-10-11 12:48:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:02,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544308043] [2020-10-11 12:48:02,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363349425] [2020-10-11 12:48:02,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:48:03,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:48:03,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:03,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:03,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:03,210 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:48:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:03,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:03,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:03,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735445054] [2020-10-11 12:48:03,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:03,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:03,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:03,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:03,259 INFO L87 Difference]: Start difference. First operand 271 states and 716 transitions. Second operand 17 states. [2020-10-11 12:48:04,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:04,115 INFO L93 Difference]: Finished difference Result 323 states and 827 transitions. [2020-10-11 12:48:04,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:48:04,116 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:04,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:04,117 INFO L225 Difference]: With dead ends: 323 [2020-10-11 12:48:04,117 INFO L226 Difference]: Without dead ends: 316 [2020-10-11 12:48:04,117 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=394, Invalid=796, Unknown=0, NotChecked=0, Total=1190 [2020-10-11 12:48:04,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-11 12:48:04,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 271. [2020-10-11 12:48:04,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-11 12:48:04,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 713 transitions. [2020-10-11 12:48:04,121 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 713 transitions. Word has length 14 [2020-10-11 12:48:04,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:04,121 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 713 transitions. [2020-10-11 12:48:04,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:04,121 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 713 transitions. [2020-10-11 12:48:04,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:04,122 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:04,122 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:04,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-10-11 12:48:04,323 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:04,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:04,323 INFO L82 PathProgramCache]: Analyzing trace with hash -742348243, now seen corresponding path program 167 times [2020-10-11 12:48:04,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:04,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705931557] [2020-10-11 12:48:04,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:04,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705931557] [2020-10-11 12:48:04,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152761638] [2020-10-11 12:48:04,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:48:04,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:48:04,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:04,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:04,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:04,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:48:04,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:48:04,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:48:04,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:48:04,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:48:04,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:48:04,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:48:04,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:48:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:04,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:04,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:04,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581797518] [2020-10-11 12:48:04,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:04,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:04,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:04,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:04,730 INFO L87 Difference]: Start difference. First operand 271 states and 713 transitions. Second operand 17 states. [2020-10-11 12:48:05,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:05,753 INFO L93 Difference]: Finished difference Result 384 states and 973 transitions. [2020-10-11 12:48:05,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:48:05,754 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:05,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:05,755 INFO L225 Difference]: With dead ends: 384 [2020-10-11 12:48:05,755 INFO L226 Difference]: Without dead ends: 379 [2020-10-11 12:48:05,755 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 12:48:05,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-11 12:48:05,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 269. [2020-10-11 12:48:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-11 12:48:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 707 transitions. [2020-10-11 12:48:05,760 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 707 transitions. Word has length 14 [2020-10-11 12:48:05,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:05,760 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 707 transitions. [2020-10-11 12:48:05,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:05,760 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 707 transitions. [2020-10-11 12:48:05,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:05,760 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:05,760 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:05,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:05,961 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:05,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:05,962 INFO L82 PathProgramCache]: Analyzing trace with hash -742340772, now seen corresponding path program 168 times [2020-10-11 12:48:05,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:05,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972433471] [2020-10-11 12:48:05,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:06,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972433471] [2020-10-11 12:48:06,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376780839] [2020-10-11 12:48:06,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:48:06,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:48:06,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:06,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:06,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:09,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:09,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:09,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125849816] [2020-10-11 12:48:09,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:09,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:09,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:09,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:48:09,129 INFO L87 Difference]: Start difference. First operand 269 states and 707 transitions. Second operand 17 states. [2020-10-11 12:48:13,454 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-11 12:48:17,682 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:48:18,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:18,247 INFO L93 Difference]: Finished difference Result 403 states and 1011 transitions. [2020-10-11 12:48:18,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 12:48:18,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:18,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:18,248 INFO L225 Difference]: With dead ends: 403 [2020-10-11 12:48:18,249 INFO L226 Difference]: Without dead ends: 398 [2020-10-11 12:48:18,249 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-10-11 12:48:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-11 12:48:18,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 273. [2020-10-11 12:48:18,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-11 12:48:18,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 721 transitions. [2020-10-11 12:48:18,253 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 721 transitions. Word has length 14 [2020-10-11 12:48:18,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:18,253 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 721 transitions. [2020-10-11 12:48:18,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 721 transitions. [2020-10-11 12:48:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:18,254 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:18,254 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:18,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-10-11 12:48:18,454 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:18,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:18,455 INFO L82 PathProgramCache]: Analyzing trace with hash -742319413, now seen corresponding path program 169 times [2020-10-11 12:48:18,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:18,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002895885] [2020-10-11 12:48:18,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:18,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002895885] [2020-10-11 12:48:18,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068771290] [2020-10-11 12:48:18,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:48:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:18,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:18,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:21,479 WARN L860 $PredicateComparison]: unable to prove that (exists ((aux_div_aux_mod_v_~j~0_491_43_92 Int) (v_~i~0_529 Int) (aux_div_v_~j~0_491_43 Int)) (let ((.cse1 (* 2 aux_div_aux_mod_v_~j~0_491_43_92)) (.cse0 (* 2 aux_div_v_~j~0_491_43))) (and (<= aux_div_v_~j~0_491_43 1) (<= (+ c_~j~0 .cse0) (* 2 v_~i~0_529)) (<= (+ .cse1 .cse0 1) v_~i~0_529) (<= c_~i~0 (+ v_~i~0_529 c_~j~0)) (<= aux_div_aux_mod_v_~j~0_491_43_92 1) (<= c_~j~0 (+ .cse1 v_~i~0_529 2)) (<= v_~i~0_529 (+ .cse1 .cse0 3))))) is different from true [2020-10-11 12:48:21,483 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:48:21,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:48:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:21,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:21,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:21,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862003896] [2020-10-11 12:48:21,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:21,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:21,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:21,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=162, Unknown=2, NotChecked=28, Total=272 [2020-10-11 12:48:21,540 INFO L87 Difference]: Start difference. First operand 273 states and 721 transitions. Second operand 17 states. [2020-10-11 12:48:21,879 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-11 12:48:26,025 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-11 12:48:31,690 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-11 12:48:35,832 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-11 12:48:41,301 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-10-11 12:48:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:42,681 INFO L93 Difference]: Finished difference Result 441 states and 1132 transitions. [2020-10-11 12:48:42,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 12:48:42,682 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:42,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:42,683 INFO L225 Difference]: With dead ends: 441 [2020-10-11 12:48:42,683 INFO L226 Difference]: Without dead ends: 434 [2020-10-11 12:48:42,683 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=482, Invalid=1068, Unknown=14, NotChecked=76, Total=1640 [2020-10-11 12:48:42,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-10-11 12:48:42,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 274. [2020-10-11 12:48:42,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-11 12:48:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 726 transitions. [2020-10-11 12:48:42,687 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 726 transitions. Word has length 14 [2020-10-11 12:48:42,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:42,688 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 726 transitions. [2020-10-11 12:48:42,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:42,688 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 726 transitions. [2020-10-11 12:48:42,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:42,688 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:42,688 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:42,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:42,889 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:42,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:42,889 INFO L82 PathProgramCache]: Analyzing trace with hash -742318452, now seen corresponding path program 170 times [2020-10-11 12:48:42,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:42,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361277956] [2020-10-11 12:48:42,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:42,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361277956] [2020-10-11 12:48:42,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034028605] [2020-10-11 12:48:42,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:48:43,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:48:43,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:43,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:43,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:45,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:48:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:45,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:45,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:45,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409143472] [2020-10-11 12:48:45,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:45,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:45,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:45,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:48:45,334 INFO L87 Difference]: Start difference. First operand 274 states and 726 transitions. Second operand 17 states. [2020-10-11 12:48:46,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:46,700 INFO L93 Difference]: Finished difference Result 425 states and 1076 transitions. [2020-10-11 12:48:46,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:48:46,701 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:46,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:46,702 INFO L225 Difference]: With dead ends: 425 [2020-10-11 12:48:46,702 INFO L226 Difference]: Without dead ends: 415 [2020-10-11 12:48:46,702 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=425, Invalid=980, Unknown=1, NotChecked=0, Total=1406 [2020-10-11 12:48:46,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2020-10-11 12:48:46,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 268. [2020-10-11 12:48:46,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-11 12:48:46,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 712 transitions. [2020-10-11 12:48:46,706 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 712 transitions. Word has length 14 [2020-10-11 12:48:46,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:46,706 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 712 transitions. [2020-10-11 12:48:46,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:46,706 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 712 transitions. [2020-10-11 12:48:46,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:46,707 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:46,707 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:46,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:46,908 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:46,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:46,909 INFO L82 PathProgramCache]: Analyzing trace with hash -742110132, now seen corresponding path program 171 times [2020-10-11 12:48:46,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:46,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539373817] [2020-10-11 12:48:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:47,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539373817] [2020-10-11 12:48:47,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178550605] [2020-10-11 12:48:47,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:48:47,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:48:47,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:47,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:47,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:47,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:47,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:47,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948426454] [2020-10-11 12:48:47,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:47,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:47,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:47,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:47,302 INFO L87 Difference]: Start difference. First operand 268 states and 712 transitions. Second operand 17 states. [2020-10-11 12:48:47,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:47,789 INFO L93 Difference]: Finished difference Result 368 states and 929 transitions. [2020-10-11 12:48:47,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:48:47,790 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:47,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:47,790 INFO L225 Difference]: With dead ends: 368 [2020-10-11 12:48:47,791 INFO L226 Difference]: Without dead ends: 364 [2020-10-11 12:48:47,791 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:48:47,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-11 12:48:47,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 267. [2020-10-11 12:48:47,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-11 12:48:47,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 709 transitions. [2020-10-11 12:48:47,795 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 709 transitions. Word has length 14 [2020-10-11 12:48:47,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:47,795 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 709 transitions. [2020-10-11 12:48:47,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:47,795 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 709 transitions. [2020-10-11 12:48:47,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:47,796 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:47,796 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:47,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-11 12:48:47,996 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:47,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:47,997 INFO L82 PathProgramCache]: Analyzing trace with hash -741447042, now seen corresponding path program 172 times [2020-10-11 12:48:47,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:47,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642953086] [2020-10-11 12:48:47,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:48,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642953086] [2020-10-11 12:48:48,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983591265] [2020-10-11 12:48:48,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:48:48,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:48:48,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:48,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:48,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:48,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:48,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:48,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637068462] [2020-10-11 12:48:48,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:48,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:48,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:48,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:48,398 INFO L87 Difference]: Start difference. First operand 267 states and 709 transitions. Second operand 17 states. [2020-10-11 12:48:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:49,146 INFO L93 Difference]: Finished difference Result 384 states and 970 transitions. [2020-10-11 12:48:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:48:49,146 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:49,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:49,147 INFO L225 Difference]: With dead ends: 384 [2020-10-11 12:48:49,147 INFO L226 Difference]: Without dead ends: 380 [2020-10-11 12:48:49,147 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:48:49,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-11 12:48:49,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 268. [2020-10-11 12:48:49,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-11 12:48:49,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 711 transitions. [2020-10-11 12:48:49,151 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 711 transitions. Word has length 14 [2020-10-11 12:48:49,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:49,152 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 711 transitions. [2020-10-11 12:48:49,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:49,152 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 711 transitions. [2020-10-11 12:48:49,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:49,152 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:49,152 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:49,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-11 12:48:49,353 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:49,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:49,354 INFO L82 PathProgramCache]: Analyzing trace with hash -741424722, now seen corresponding path program 173 times [2020-10-11 12:48:49,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:49,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947223875] [2020-10-11 12:48:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:49,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947223875] [2020-10-11 12:48:49,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58504838] [2020-10-11 12:48:49,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:48:49,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:48:49,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:49,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:49,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:49,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:48:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:49,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:49,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:49,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784401977] [2020-10-11 12:48:49,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:49,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:49,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:49,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:49,763 INFO L87 Difference]: Start difference. First operand 268 states and 711 transitions. Second operand 17 states. [2020-10-11 12:48:50,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:50,941 INFO L93 Difference]: Finished difference Result 416 states and 1051 transitions. [2020-10-11 12:48:50,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:48:50,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:50,942 INFO L225 Difference]: With dead ends: 416 [2020-10-11 12:48:50,942 INFO L226 Difference]: Without dead ends: 410 [2020-10-11 12:48:50,943 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 12:48:50,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-11 12:48:50,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 266. [2020-10-11 12:48:50,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-11 12:48:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 704 transitions. [2020-10-11 12:48:50,948 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 704 transitions. Word has length 14 [2020-10-11 12:48:50,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:50,948 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 704 transitions. [2020-10-11 12:48:50,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 704 transitions. [2020-10-11 12:48:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:50,949 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:50,949 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:51,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-11 12:48:51,154 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:51,154 INFO L82 PathProgramCache]: Analyzing trace with hash -541944403, now seen corresponding path program 174 times [2020-10-11 12:48:51,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:51,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818562998] [2020-10-11 12:48:51,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:51,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:51,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818562998] [2020-10-11 12:48:51,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051946298] [2020-10-11 12:48:51,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:48:51,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:48:51,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:51,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:51,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:51,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:51,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:51,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088267500] [2020-10-11 12:48:51,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:51,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:51,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:51,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:51,494 INFO L87 Difference]: Start difference. First operand 266 states and 704 transitions. Second operand 17 states. [2020-10-11 12:48:51,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:51,918 INFO L93 Difference]: Finished difference Result 355 states and 889 transitions. [2020-10-11 12:48:51,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:48:51,918 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:51,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:51,919 INFO L225 Difference]: With dead ends: 355 [2020-10-11 12:48:51,919 INFO L226 Difference]: Without dead ends: 352 [2020-10-11 12:48:51,919 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:48:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-11 12:48:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 270. [2020-10-11 12:48:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-11 12:48:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 718 transitions. [2020-10-11 12:48:51,923 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 718 transitions. Word has length 14 [2020-10-11 12:48:51,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:51,924 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 718 transitions. [2020-10-11 12:48:51,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 718 transitions. [2020-10-11 12:48:51,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:51,924 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:51,924 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:52,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-10-11 12:48:52,125 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:52,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:52,125 INFO L82 PathProgramCache]: Analyzing trace with hash -541943442, now seen corresponding path program 175 times [2020-10-11 12:48:52,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:52,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140547717] [2020-10-11 12:48:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:52,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140547717] [2020-10-11 12:48:52,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673856643] [2020-10-11 12:48:52,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:48:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:52,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:52,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:52,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:52,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:52,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813708960] [2020-10-11 12:48:52,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:52,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:52,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:52,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:52,489 INFO L87 Difference]: Start difference. First operand 270 states and 718 transitions. Second operand 17 states. [2020-10-11 12:48:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:53,132 INFO L93 Difference]: Finished difference Result 390 states and 972 transitions. [2020-10-11 12:48:53,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:48:53,133 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:53,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:53,133 INFO L225 Difference]: With dead ends: 390 [2020-10-11 12:48:53,133 INFO L226 Difference]: Without dead ends: 385 [2020-10-11 12:48:53,133 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:48:53,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-11 12:48:53,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 271. [2020-10-11 12:48:53,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-11 12:48:53,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 721 transitions. [2020-10-11 12:48:53,138 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 721 transitions. Word has length 14 [2020-10-11 12:48:53,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:53,138 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 721 transitions. [2020-10-11 12:48:53,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:53,138 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 721 transitions. [2020-10-11 12:48:53,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:53,138 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:53,138 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:53,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-11 12:48:53,339 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:53,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:53,340 INFO L82 PathProgramCache]: Analyzing trace with hash -541914612, now seen corresponding path program 176 times [2020-10-11 12:48:53,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:53,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164137376] [2020-10-11 12:48:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:53,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164137376] [2020-10-11 12:48:53,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979457783] [2020-10-11 12:48:53,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:48:53,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:48:53,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:53,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:53,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:53,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:53,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:53,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:53,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155395998] [2020-10-11 12:48:53,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:53,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:53,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:53,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:53,683 INFO L87 Difference]: Start difference. First operand 271 states and 721 transitions. Second operand 17 states. [2020-10-11 12:48:54,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:54,092 INFO L93 Difference]: Finished difference Result 392 states and 981 transitions. [2020-10-11 12:48:54,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:48:54,093 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:54,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:54,093 INFO L225 Difference]: With dead ends: 392 [2020-10-11 12:48:54,093 INFO L226 Difference]: Without dead ends: 387 [2020-10-11 12:48:54,094 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:48:54,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-11 12:48:54,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 270. [2020-10-11 12:48:54,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-11 12:48:54,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 718 transitions. [2020-10-11 12:48:54,098 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 718 transitions. Word has length 14 [2020-10-11 12:48:54,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:54,098 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 718 transitions. [2020-10-11 12:48:54,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:54,098 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 718 transitions. [2020-10-11 12:48:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:54,098 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:54,099 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:54,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2020-10-11 12:48:54,299 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:54,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:54,300 INFO L82 PathProgramCache]: Analyzing trace with hash -540990130, now seen corresponding path program 177 times [2020-10-11 12:48:54,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:54,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971437578] [2020-10-11 12:48:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:54,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971437578] [2020-10-11 12:48:54,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738198301] [2020-10-11 12:48:54,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:48:54,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:48:54,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:54,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:54,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:54,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:54,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:54,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877717986] [2020-10-11 12:48:54,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:54,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:54,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:54,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:54,642 INFO L87 Difference]: Start difference. First operand 270 states and 718 transitions. Second operand 17 states. [2020-10-11 12:48:55,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:55,000 INFO L93 Difference]: Finished difference Result 359 states and 898 transitions. [2020-10-11 12:48:55,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:48:55,001 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:55,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:55,001 INFO L225 Difference]: With dead ends: 359 [2020-10-11 12:48:55,001 INFO L226 Difference]: Without dead ends: 343 [2020-10-11 12:48:55,002 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:48:55,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-11 12:48:55,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 268. [2020-10-11 12:48:55,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-11 12:48:55,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 710 transitions. [2020-10-11 12:48:55,005 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 710 transitions. Word has length 14 [2020-10-11 12:48:55,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:55,005 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 710 transitions. [2020-10-11 12:48:55,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:55,005 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 710 transitions. [2020-10-11 12:48:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:55,006 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:55,006 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:55,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:55,206 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:55,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:55,207 INFO L82 PathProgramCache]: Analyzing trace with hash 95285087, now seen corresponding path program 178 times [2020-10-11 12:48:55,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:55,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982035555] [2020-10-11 12:48:55,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:55,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982035555] [2020-10-11 12:48:55,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240608374] [2020-10-11 12:48:55,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:48:55,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:48:55,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:55,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:55,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:55,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:55,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:55,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316896032] [2020-10-11 12:48:55,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:55,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:55,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:55,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:55,544 INFO L87 Difference]: Start difference. First operand 268 states and 710 transitions. Second operand 17 states. [2020-10-11 12:48:56,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:56,259 INFO L93 Difference]: Finished difference Result 369 states and 917 transitions. [2020-10-11 12:48:56,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:48:56,260 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:56,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:56,261 INFO L225 Difference]: With dead ends: 369 [2020-10-11 12:48:56,261 INFO L226 Difference]: Without dead ends: 366 [2020-10-11 12:48:56,261 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 12:48:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-10-11 12:48:56,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 271. [2020-10-11 12:48:56,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-11 12:48:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 721 transitions. [2020-10-11 12:48:56,266 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 721 transitions. Word has length 14 [2020-10-11 12:48:56,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:56,266 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 721 transitions. [2020-10-11 12:48:56,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:56,266 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 721 transitions. [2020-10-11 12:48:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:56,266 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:56,266 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:56,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-10-11 12:48:56,467 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:56,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:56,468 INFO L82 PathProgramCache]: Analyzing trace with hash 95286048, now seen corresponding path program 179 times [2020-10-11 12:48:56,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:56,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860350954] [2020-10-11 12:48:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:56,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860350954] [2020-10-11 12:48:56,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790555907] [2020-10-11 12:48:56,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:48:56,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:48:56,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:56,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:56,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:56,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:56,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:56,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453680469] [2020-10-11 12:48:56,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:56,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:56,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:56,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:56,813 INFO L87 Difference]: Start difference. First operand 271 states and 721 transitions. Second operand 17 states. [2020-10-11 12:48:57,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:57,526 INFO L93 Difference]: Finished difference Result 425 states and 1047 transitions. [2020-10-11 12:48:57,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:48:57,527 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:57,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:57,528 INFO L225 Difference]: With dead ends: 425 [2020-10-11 12:48:57,528 INFO L226 Difference]: Without dead ends: 410 [2020-10-11 12:48:57,528 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:48:57,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-11 12:48:57,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 276. [2020-10-11 12:48:57,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-11 12:48:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 733 transitions. [2020-10-11 12:48:57,532 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 733 transitions. Word has length 14 [2020-10-11 12:48:57,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:57,532 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 733 transitions. [2020-10-11 12:48:57,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:57,533 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 733 transitions. [2020-10-11 12:48:57,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:57,533 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:57,533 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:57,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:57,734 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:57,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:57,734 INFO L82 PathProgramCache]: Analyzing trace with hash 95314878, now seen corresponding path program 180 times [2020-10-11 12:48:57,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:57,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289719347] [2020-10-11 12:48:57,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:57,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289719347] [2020-10-11 12:48:57,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377192766] [2020-10-11 12:48:57,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:48:57,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:48:57,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:57,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:57,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:58,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:58,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:58,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531712691] [2020-10-11 12:48:58,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:58,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:58,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:58,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:58,078 INFO L87 Difference]: Start difference. First operand 276 states and 733 transitions. Second operand 17 states. [2020-10-11 12:48:58,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:58,677 INFO L93 Difference]: Finished difference Result 404 states and 1006 transitions. [2020-10-11 12:48:58,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:48:58,678 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:58,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:58,679 INFO L225 Difference]: With dead ends: 404 [2020-10-11 12:48:58,679 INFO L226 Difference]: Without dead ends: 399 [2020-10-11 12:48:58,679 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:48:58,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-10-11 12:48:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 274. [2020-10-11 12:48:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-11 12:48:58,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 728 transitions. [2020-10-11 12:48:58,688 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 728 transitions. Word has length 14 [2020-10-11 12:48:58,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:58,688 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 728 transitions. [2020-10-11 12:48:58,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 728 transitions. [2020-10-11 12:48:58,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:58,689 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:58,689 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:58,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:58,890 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:58,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:58,890 INFO L82 PathProgramCache]: Analyzing trace with hash 115840877, now seen corresponding path program 181 times [2020-10-11 12:48:58,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:58,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771052711] [2020-10-11 12:48:58,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:58,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771052711] [2020-10-11 12:48:58,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717259609] [2020-10-11 12:48:58,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:48:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:59,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:59,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:59,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:59,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:59,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848419193] [2020-10-11 12:48:59,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:59,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:59,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:59,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:59,229 INFO L87 Difference]: Start difference. First operand 274 states and 728 transitions. Second operand 17 states. [2020-10-11 12:49:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:00,031 INFO L93 Difference]: Finished difference Result 369 states and 920 transitions. [2020-10-11 12:49:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:49:00,032 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:00,032 INFO L225 Difference]: With dead ends: 369 [2020-10-11 12:49:00,033 INFO L226 Difference]: Without dead ends: 366 [2020-10-11 12:49:00,033 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 12:49:00,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-10-11 12:49:00,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 276. [2020-10-11 12:49:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-11 12:49:00,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 736 transitions. [2020-10-11 12:49:00,042 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 736 transitions. Word has length 14 [2020-10-11 12:49:00,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:00,042 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 736 transitions. [2020-10-11 12:49:00,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:00,042 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 736 transitions. [2020-10-11 12:49:00,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:00,043 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:00,043 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:00,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:00,243 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:00,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:00,244 INFO L82 PathProgramCache]: Analyzing trace with hash 115841838, now seen corresponding path program 182 times [2020-10-11 12:49:00,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:00,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149266690] [2020-10-11 12:49:00,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:00,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149266690] [2020-10-11 12:49:00,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107176643] [2020-10-11 12:49:00,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:49:00,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:49:00,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:00,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:00,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:00,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:00,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:00,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189865686] [2020-10-11 12:49:00,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:00,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:00,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:00,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:00,583 INFO L87 Difference]: Start difference. First operand 276 states and 736 transitions. Second operand 17 states. [2020-10-11 12:49:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:01,423 INFO L93 Difference]: Finished difference Result 401 states and 999 transitions. [2020-10-11 12:49:01,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 12:49:01,425 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:01,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:01,425 INFO L225 Difference]: With dead ends: 401 [2020-10-11 12:49:01,426 INFO L226 Difference]: Without dead ends: 396 [2020-10-11 12:49:01,426 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 12:49:01,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-11 12:49:01,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 278. [2020-10-11 12:49:01,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-11 12:49:01,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 742 transitions. [2020-10-11 12:49:01,430 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 742 transitions. Word has length 14 [2020-10-11 12:49:01,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:01,430 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 742 transitions. [2020-10-11 12:49:01,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:01,430 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 742 transitions. [2020-10-11 12:49:01,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:01,431 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:01,431 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:01,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-11 12:49:01,632 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:01,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:01,632 INFO L82 PathProgramCache]: Analyzing trace with hash 116503967, now seen corresponding path program 183 times [2020-10-11 12:49:01,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:01,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925603035] [2020-10-11 12:49:01,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:01,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925603035] [2020-10-11 12:49:01,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650180271] [2020-10-11 12:49:01,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:49:01,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:49:01,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:01,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 12:49:01,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:01,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:01,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:01,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-10-11 12:49:01,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845842566] [2020-10-11 12:49:01,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 12:49:01,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:01,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 12:49:01,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:49:01,914 INFO L87 Difference]: Start difference. First operand 278 states and 742 transitions. Second operand 16 states. [2020-10-11 12:49:02,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:02,668 INFO L93 Difference]: Finished difference Result 360 states and 898 transitions. [2020-10-11 12:49:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:49:02,669 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-10-11 12:49:02,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:02,670 INFO L225 Difference]: With dead ends: 360 [2020-10-11 12:49:02,670 INFO L226 Difference]: Without dead ends: 357 [2020-10-11 12:49:02,670 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=282, Invalid=710, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:49:02,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-11 12:49:02,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 280. [2020-10-11 12:49:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-11 12:49:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 749 transitions. [2020-10-11 12:49:02,674 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 749 transitions. Word has length 14 [2020-10-11 12:49:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:02,674 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 749 transitions. [2020-10-11 12:49:02,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 12:49:02,674 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 749 transitions. [2020-10-11 12:49:02,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:02,675 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:02,675 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:02,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:02,876 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:02,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:02,876 INFO L82 PathProgramCache]: Analyzing trace with hash 116525326, now seen corresponding path program 184 times [2020-10-11 12:49:02,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:02,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464492311] [2020-10-11 12:49:02,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:02,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:02,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464492311] [2020-10-11 12:49:02,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225322772] [2020-10-11 12:49:02,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:49:03,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:49:03,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:03,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:03,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:03,182 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:49:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:03,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:03,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:03,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151349163] [2020-10-11 12:49:03,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:03,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:03,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:03,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:03,200 INFO L87 Difference]: Start difference. First operand 280 states and 749 transitions. Second operand 17 states. [2020-10-11 12:49:03,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:03,912 INFO L93 Difference]: Finished difference Result 316 states and 812 transitions. [2020-10-11 12:49:03,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:49:03,913 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:03,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:03,914 INFO L225 Difference]: With dead ends: 316 [2020-10-11 12:49:03,914 INFO L226 Difference]: Without dead ends: 308 [2020-10-11 12:49:03,914 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=436, Invalid=896, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 12:49:03,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-10-11 12:49:03,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 280. [2020-10-11 12:49:03,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-11 12:49:03,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 745 transitions. [2020-10-11 12:49:03,919 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 745 transitions. Word has length 14 [2020-10-11 12:49:03,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:03,919 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 745 transitions. [2020-10-11 12:49:03,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:03,919 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 745 transitions. [2020-10-11 12:49:03,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:03,920 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:03,920 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:04,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-11 12:49:04,129 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:04,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:04,130 INFO L82 PathProgramCache]: Analyzing trace with hash 116526287, now seen corresponding path program 185 times [2020-10-11 12:49:04,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:04,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928116543] [2020-10-11 12:49:04,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:04,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928116543] [2020-10-11 12:49:04,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575862034] [2020-10-11 12:49:04,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:49:04,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:49:04,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:04,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:04,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:04,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:49:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:04,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:04,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:04,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833507060] [2020-10-11 12:49:04,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:04,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:04,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:04,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:04,497 INFO L87 Difference]: Start difference. First operand 280 states and 745 transitions. Second operand 17 states. [2020-10-11 12:49:05,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:05,515 INFO L93 Difference]: Finished difference Result 392 states and 995 transitions. [2020-10-11 12:49:05,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 12:49:05,515 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:05,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:05,516 INFO L225 Difference]: With dead ends: 392 [2020-10-11 12:49:05,516 INFO L226 Difference]: Without dead ends: 387 [2020-10-11 12:49:05,516 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 12:49:05,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-11 12:49:05,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 278. [2020-10-11 12:49:05,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-11 12:49:05,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 739 transitions. [2020-10-11 12:49:05,521 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 739 transitions. Word has length 14 [2020-10-11 12:49:05,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:05,521 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 739 transitions. [2020-10-11 12:49:05,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:05,521 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 739 transitions. [2020-10-11 12:49:05,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:05,522 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:05,522 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:05,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-11 12:49:05,723 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:05,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:05,723 INFO L82 PathProgramCache]: Analyzing trace with hash 116533758, now seen corresponding path program 186 times [2020-10-11 12:49:05,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:05,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956366671] [2020-10-11 12:49:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:05,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956366671] [2020-10-11 12:49:05,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203462910] [2020-10-11 12:49:05,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:49:05,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:49:05,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:05,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:05,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:06,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:06,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:06,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106400711] [2020-10-11 12:49:06,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:06,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:06,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:06,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:06,082 INFO L87 Difference]: Start difference. First operand 278 states and 739 transitions. Second operand 17 states. [2020-10-11 12:49:07,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:07,013 INFO L93 Difference]: Finished difference Result 409 states and 1032 transitions. [2020-10-11 12:49:07,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 12:49:07,014 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:07,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:07,015 INFO L225 Difference]: With dead ends: 409 [2020-10-11 12:49:07,015 INFO L226 Difference]: Without dead ends: 404 [2020-10-11 12:49:07,015 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 12:49:07,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-11 12:49:07,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 282. [2020-10-11 12:49:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-11 12:49:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 753 transitions. [2020-10-11 12:49:07,019 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 753 transitions. Word has length 14 [2020-10-11 12:49:07,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:07,019 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 753 transitions. [2020-10-11 12:49:07,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:07,019 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 753 transitions. [2020-10-11 12:49:07,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:07,020 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:07,020 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:07,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:07,221 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:07,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:07,221 INFO L82 PathProgramCache]: Analyzing trace with hash 116555117, now seen corresponding path program 187 times [2020-10-11 12:49:07,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:07,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120636669] [2020-10-11 12:49:07,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:07,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120636669] [2020-10-11 12:49:07,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331184544] [2020-10-11 12:49:07,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:49:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:07,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:07,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:07,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:49:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:07,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:07,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:07,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599252407] [2020-10-11 12:49:07,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:07,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:07,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:07,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:07,593 INFO L87 Difference]: Start difference. First operand 282 states and 753 transitions. Second operand 17 states. [2020-10-11 12:49:08,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:08,660 INFO L93 Difference]: Finished difference Result 409 states and 1039 transitions. [2020-10-11 12:49:08,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 12:49:08,661 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:08,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:08,661 INFO L225 Difference]: With dead ends: 409 [2020-10-11 12:49:08,662 INFO L226 Difference]: Without dead ends: 404 [2020-10-11 12:49:08,662 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 12:49:08,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-11 12:49:08,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 282. [2020-10-11 12:49:08,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-11 12:49:08,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 753 transitions. [2020-10-11 12:49:08,666 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 753 transitions. Word has length 14 [2020-10-11 12:49:08,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:08,666 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 753 transitions. [2020-10-11 12:49:08,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:08,667 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 753 transitions. [2020-10-11 12:49:08,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:08,667 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:08,667 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:08,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-11 12:49:08,868 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:08,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:08,868 INFO L82 PathProgramCache]: Analyzing trace with hash 116556078, now seen corresponding path program 188 times [2020-10-11 12:49:08,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:08,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195984360] [2020-10-11 12:49:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:08,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195984360] [2020-10-11 12:49:08,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98747922] [2020-10-11 12:49:08,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:49:09,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:49:09,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:09,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:09,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:09,203 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:49:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:09,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:09,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:09,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873464732] [2020-10-11 12:49:09,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:09,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:09,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:09,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:09,230 INFO L87 Difference]: Start difference. First operand 282 states and 753 transitions. Second operand 17 states. [2020-10-11 12:49:10,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:10,492 INFO L93 Difference]: Finished difference Result 436 states and 1104 transitions. [2020-10-11 12:49:10,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:49:10,493 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:10,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:10,493 INFO L225 Difference]: With dead ends: 436 [2020-10-11 12:49:10,493 INFO L226 Difference]: Without dead ends: 426 [2020-10-11 12:49:10,494 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 12:49:10,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-11 12:49:10,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 275. [2020-10-11 12:49:10,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-11 12:49:10,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 734 transitions. [2020-10-11 12:49:10,498 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 734 transitions. Word has length 14 [2020-10-11 12:49:10,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:10,498 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 734 transitions. [2020-10-11 12:49:10,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:10,498 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 734 transitions. [2020-10-11 12:49:10,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:10,499 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:10,499 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:10,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2020-10-11 12:49:10,700 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:10,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:10,700 INFO L82 PathProgramCache]: Analyzing trace with hash 116764398, now seen corresponding path program 189 times [2020-10-11 12:49:10,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:10,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560819983] [2020-10-11 12:49:10,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:10,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560819983] [2020-10-11 12:49:10,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638383571] [2020-10-11 12:49:10,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:49:10,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:49:10,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:10,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:10,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:11,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:11,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:11,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194759587] [2020-10-11 12:49:11,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:11,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:11,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:11,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:11,053 INFO L87 Difference]: Start difference. First operand 275 states and 734 transitions. Second operand 17 states. [2020-10-11 12:49:11,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:11,767 INFO L93 Difference]: Finished difference Result 421 states and 1054 transitions. [2020-10-11 12:49:11,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:49:11,769 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:11,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:11,770 INFO L225 Difference]: With dead ends: 421 [2020-10-11 12:49:11,770 INFO L226 Difference]: Without dead ends: 407 [2020-10-11 12:49:11,770 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:49:11,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-10-11 12:49:11,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 277. [2020-10-11 12:49:11,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-11 12:49:11,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 743 transitions. [2020-10-11 12:49:11,774 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 743 transitions. Word has length 14 [2020-10-11 12:49:11,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:11,775 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 743 transitions. [2020-10-11 12:49:11,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:11,775 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 743 transitions. [2020-10-11 12:49:11,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:11,775 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:11,775 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:11,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:11,976 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:11,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:11,976 INFO L82 PathProgramCache]: Analyzing trace with hash 117427488, now seen corresponding path program 190 times [2020-10-11 12:49:11,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:11,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703767557] [2020-10-11 12:49:11,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:12,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703767557] [2020-10-11 12:49:12,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952994538] [2020-10-11 12:49:12,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:49:12,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:49:12,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:12,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:12,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:12,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:12,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:12,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680007767] [2020-10-11 12:49:12,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:12,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:12,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:12,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:12,405 INFO L87 Difference]: Start difference. First operand 277 states and 743 transitions. Second operand 17 states. [2020-10-11 12:49:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:13,289 INFO L93 Difference]: Finished difference Result 410 states and 1043 transitions. [2020-10-11 12:49:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:49:13,290 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:13,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:13,290 INFO L225 Difference]: With dead ends: 410 [2020-10-11 12:49:13,290 INFO L226 Difference]: Without dead ends: 405 [2020-10-11 12:49:13,291 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 12:49:13,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-10-11 12:49:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 281. [2020-10-11 12:49:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-11 12:49:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 757 transitions. [2020-10-11 12:49:13,295 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 757 transitions. Word has length 14 [2020-10-11 12:49:13,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:13,295 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 757 transitions. [2020-10-11 12:49:13,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:13,295 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 757 transitions. [2020-10-11 12:49:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:13,296 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:13,296 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:13,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:13,497 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:13,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:13,497 INFO L82 PathProgramCache]: Analyzing trace with hash 117448847, now seen corresponding path program 191 times [2020-10-11 12:49:13,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:13,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381032988] [2020-10-11 12:49:13,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:13,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381032988] [2020-10-11 12:49:13,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317026444] [2020-10-11 12:49:13,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:49:13,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:49:13,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:13,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:13,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:13,807 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:49:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:13,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:13,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:13,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711235063] [2020-10-11 12:49:13,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:13,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:13,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:13,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:13,823 INFO L87 Difference]: Start difference. First operand 281 states and 757 transitions. Second operand 17 states. [2020-10-11 12:49:14,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:14,859 INFO L93 Difference]: Finished difference Result 431 states and 1100 transitions. [2020-10-11 12:49:14,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:49:14,860 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:14,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:14,861 INFO L225 Difference]: With dead ends: 431 [2020-10-11 12:49:14,861 INFO L226 Difference]: Without dead ends: 421 [2020-10-11 12:49:14,861 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 12:49:14,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-10-11 12:49:14,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 282. [2020-10-11 12:49:14,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-11 12:49:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 762 transitions. [2020-10-11 12:49:14,866 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 762 transitions. Word has length 14 [2020-10-11 12:49:14,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:14,866 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 762 transitions. [2020-10-11 12:49:14,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:14,866 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 762 transitions. [2020-10-11 12:49:14,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:14,866 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:14,866 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:15,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:15,067 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:15,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:15,068 INFO L82 PathProgramCache]: Analyzing trace with hash 117449808, now seen corresponding path program 192 times [2020-10-11 12:49:15,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:15,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967779340] [2020-10-11 12:49:15,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:15,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967779340] [2020-10-11 12:49:15,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864726932] [2020-10-11 12:49:15,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:49:15,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:49:15,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:15,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:15,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:15,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:49:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:15,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:15,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:15,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059790938] [2020-10-11 12:49:15,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:15,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:15,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:15,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:15,397 INFO L87 Difference]: Start difference. First operand 282 states and 762 transitions. Second operand 17 states. [2020-10-11 12:49:16,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:16,410 INFO L93 Difference]: Finished difference Result 457 states and 1163 transitions. [2020-10-11 12:49:16,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 12:49:16,411 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:16,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:16,412 INFO L225 Difference]: With dead ends: 457 [2020-10-11 12:49:16,412 INFO L226 Difference]: Without dead ends: 447 [2020-10-11 12:49:16,412 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 12:49:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-11 12:49:16,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 278. [2020-10-11 12:49:16,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-11 12:49:16,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 748 transitions. [2020-10-11 12:49:16,417 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 748 transitions. Word has length 14 [2020-10-11 12:49:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:16,417 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 748 transitions. [2020-10-11 12:49:16,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:16,417 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 748 transitions. [2020-10-11 12:49:16,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:16,418 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:16,418 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:16,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:16,619 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:16,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:16,619 INFO L82 PathProgramCache]: Analyzing trace with hash 117478638, now seen corresponding path program 193 times [2020-10-11 12:49:16,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:16,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858680663] [2020-10-11 12:49:16,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:16,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858680663] [2020-10-11 12:49:16,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305569405] [2020-10-11 12:49:16,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:49:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:16,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:16,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:16,940 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:49:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:16,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:16,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:16,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241619722] [2020-10-11 12:49:16,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:16,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:16,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:16,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:16,958 INFO L87 Difference]: Start difference. First operand 278 states and 748 transitions. Second operand 17 states. [2020-10-11 12:49:18,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:18,075 INFO L93 Difference]: Finished difference Result 441 states and 1123 transitions. [2020-10-11 12:49:18,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 12:49:18,076 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:18,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:18,077 INFO L225 Difference]: With dead ends: 441 [2020-10-11 12:49:18,077 INFO L226 Difference]: Without dead ends: 431 [2020-10-11 12:49:18,077 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 12:49:18,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-10-11 12:49:18,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 277. [2020-10-11 12:49:18,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-11 12:49:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 744 transitions. [2020-10-11 12:49:18,081 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 744 transitions. Word has length 14 [2020-10-11 12:49:18,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:18,081 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 744 transitions. [2020-10-11 12:49:18,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:18,081 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 744 transitions. [2020-10-11 12:49:18,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:18,082 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:18,082 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:18,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:18,283 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:18,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:18,283 INFO L82 PathProgramCache]: Analyzing trace with hash 144470028, now seen corresponding path program 194 times [2020-10-11 12:49:18,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:18,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806079679] [2020-10-11 12:49:18,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:18,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806079679] [2020-10-11 12:49:18,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552208357] [2020-10-11 12:49:18,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:49:18,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:49:18,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:18,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:18,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:18,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:18,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:18,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355800606] [2020-10-11 12:49:18,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:18,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:18,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:18,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:18,669 INFO L87 Difference]: Start difference. First operand 277 states and 744 transitions. Second operand 17 states. [2020-10-11 12:49:19,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:19,615 INFO L93 Difference]: Finished difference Result 401 states and 1008 transitions. [2020-10-11 12:49:19,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:49:19,616 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:19,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:19,617 INFO L225 Difference]: With dead ends: 401 [2020-10-11 12:49:19,617 INFO L226 Difference]: Without dead ends: 397 [2020-10-11 12:49:19,618 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 12:49:19,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-11 12:49:19,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 276. [2020-10-11 12:49:19,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-11 12:49:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 741 transitions. [2020-10-11 12:49:19,623 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 741 transitions. Word has length 14 [2020-10-11 12:49:19,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:19,623 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 741 transitions. [2020-10-11 12:49:19,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:19,624 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 741 transitions. [2020-10-11 12:49:19,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:19,631 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:19,631 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:19,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-11 12:49:19,843 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:19,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:19,843 INFO L82 PathProgramCache]: Analyzing trace with hash 145133118, now seen corresponding path program 195 times [2020-10-11 12:49:19,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:19,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194891725] [2020-10-11 12:49:19,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:19,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194891725] [2020-10-11 12:49:19,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049417223] [2020-10-11 12:49:19,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:49:19,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:49:19,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:19,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:49:19,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:20,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:20,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:20,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399271870] [2020-10-11 12:49:20,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:20,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:20,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:20,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:20,225 INFO L87 Difference]: Start difference. First operand 276 states and 741 transitions. Second operand 17 states. [2020-10-11 12:49:21,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:21,331 INFO L93 Difference]: Finished difference Result 402 states and 1016 transitions. [2020-10-11 12:49:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 12:49:21,333 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:21,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:21,334 INFO L225 Difference]: With dead ends: 402 [2020-10-11 12:49:21,334 INFO L226 Difference]: Without dead ends: 398 [2020-10-11 12:49:21,334 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 12:49:21,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-11 12:49:21,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 277. [2020-10-11 12:49:21,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-11 12:49:21,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 743 transitions. [2020-10-11 12:49:21,338 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 743 transitions. Word has length 14 [2020-10-11 12:49:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:21,343 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 743 transitions. [2020-10-11 12:49:21,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:21,343 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 743 transitions. [2020-10-11 12:49:21,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:21,343 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:21,343 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:21,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-11 12:49:21,544 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:21,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:21,545 INFO L82 PathProgramCache]: Analyzing trace with hash 145155438, now seen corresponding path program 196 times [2020-10-11 12:49:21,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:21,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074722205] [2020-10-11 12:49:21,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:21,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074722205] [2020-10-11 12:49:21,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043784964] [2020-10-11 12:49:21,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:49:21,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:49:21,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:21,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:21,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:21,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:49:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:21,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:21,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:21,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461327944] [2020-10-11 12:49:21,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:21,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:21,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:21,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:21,943 INFO L87 Difference]: Start difference. First operand 277 states and 743 transitions. Second operand 17 states. [2020-10-11 12:49:23,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:23,515 INFO L93 Difference]: Finished difference Result 433 states and 1104 transitions. [2020-10-11 12:49:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:49:23,516 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:23,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:23,516 INFO L225 Difference]: With dead ends: 433 [2020-10-11 12:49:23,516 INFO L226 Difference]: Without dead ends: 427 [2020-10-11 12:49:23,517 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 12:49:23,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-10-11 12:49:23,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 275. [2020-10-11 12:49:23,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-11 12:49:23,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 736 transitions. [2020-10-11 12:49:23,521 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 736 transitions. Word has length 14 [2020-10-11 12:49:23,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:23,521 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 736 transitions. [2020-10-11 12:49:23,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:23,522 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 736 transitions. [2020-10-11 12:49:23,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:23,522 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:23,522 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:23,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-10-11 12:49:23,723 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:23,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:23,723 INFO L82 PathProgramCache]: Analyzing trace with hash 145184268, now seen corresponding path program 197 times [2020-10-11 12:49:23,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:23,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877552715] [2020-10-11 12:49:23,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:23,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877552715] [2020-10-11 12:49:23,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599757741] [2020-10-11 12:49:23,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:49:23,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:49:23,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:23,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:23,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:28,194 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:49:33,628 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-10-11 12:49:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:33,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:33,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-11 12:49:33,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925784883] [2020-10-11 12:49:33,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 12:49:33,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:33,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 12:49:33,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2020-10-11 12:49:33,631 INFO L87 Difference]: Start difference. First operand 275 states and 736 transitions. Second operand 18 states. [2020-10-11 12:49:37,796 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-11 12:49:42,291 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-11 12:49:45,583 WARN L193 SmtUtils]: Spent 943.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 22 [2020-10-11 12:49:47,739 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-11 12:50:14,720 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-11 12:51:02,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:02,757 INFO L93 Difference]: Finished difference Result 443 states and 1112 transitions. [2020-10-11 12:51:02,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:51:02,758 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-11 12:51:02,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:02,759 INFO L225 Difference]: With dead ends: 443 [2020-10-11 12:51:02,759 INFO L226 Difference]: Without dead ends: 437 [2020-10-11 12:51:02,760 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 65.1s TimeCoverageRelationStatistics Valid=555, Invalid=1408, Unknown=17, NotChecked=0, Total=1980 [2020-10-11 12:51:02,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-11 12:51:02,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 273. [2020-10-11 12:51:02,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-11 12:51:02,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 726 transitions. [2020-10-11 12:51:02,764 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 726 transitions. Word has length 14 [2020-10-11 12:51:02,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:02,765 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 726 transitions. [2020-10-11 12:51:02,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 12:51:02,765 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 726 transitions. [2020-10-11 12:51:02,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:02,765 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:02,765 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:02,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-11 12:51:02,966 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:02,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:02,966 INFO L82 PathProgramCache]: Analyzing trace with hash 146086430, now seen corresponding path program 198 times [2020-10-11 12:51:02,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:02,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987233292] [2020-10-11 12:51:02,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:03,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987233292] [2020-10-11 12:51:03,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728936462] [2020-10-11 12:51:03,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:03,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:51:03,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:03,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:03,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:03,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:03,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:03,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565534102] [2020-10-11 12:51:03,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:03,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:03,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:03,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:03,314 INFO L87 Difference]: Start difference. First operand 273 states and 726 transitions. Second operand 17 states. [2020-10-11 12:51:03,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:03,706 INFO L93 Difference]: Finished difference Result 351 states and 887 transitions. [2020-10-11 12:51:03,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:51:03,707 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:03,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:03,707 INFO L225 Difference]: With dead ends: 351 [2020-10-11 12:51:03,707 INFO L226 Difference]: Without dead ends: 338 [2020-10-11 12:51:03,708 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:51:03,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-10-11 12:51:03,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 274. [2020-10-11 12:51:03,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-11 12:51:03,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 727 transitions. [2020-10-11 12:51:03,712 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 727 transitions. Word has length 14 [2020-10-11 12:51:03,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:03,712 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 727 transitions. [2020-10-11 12:51:03,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:03,712 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 727 transitions. [2020-10-11 12:51:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:03,712 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:03,712 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:03,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2020-10-11 12:51:03,913 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:03,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:03,914 INFO L82 PathProgramCache]: Analyzing trace with hash 146108750, now seen corresponding path program 199 times [2020-10-11 12:51:03,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:03,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920270119] [2020-10-11 12:51:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:04,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920270119] [2020-10-11 12:51:04,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726921689] [2020-10-11 12:51:04,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:04,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:04,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:04,216 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:51:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:04,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:04,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:04,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849166362] [2020-10-11 12:51:04,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:04,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:04,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:04,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:04,236 INFO L87 Difference]: Start difference. First operand 274 states and 727 transitions. Second operand 17 states. [2020-10-11 12:51:04,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:04,725 INFO L93 Difference]: Finished difference Result 354 states and 891 transitions. [2020-10-11 12:51:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:51:04,726 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:04,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:04,727 INFO L225 Difference]: With dead ends: 354 [2020-10-11 12:51:04,727 INFO L226 Difference]: Without dead ends: 330 [2020-10-11 12:51:04,727 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:51:04,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-11 12:51:04,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 267. [2020-10-11 12:51:04,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-11 12:51:04,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 713 transitions. [2020-10-11 12:51:04,730 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 713 transitions. Word has length 14 [2020-10-11 12:51:04,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:04,731 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 713 transitions. [2020-10-11 12:51:04,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:04,731 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 713 transitions. [2020-10-11 12:51:04,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:04,731 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:04,731 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:04,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:04,932 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:04,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:04,932 INFO L82 PathProgramCache]: Analyzing trace with hash 2034084541, now seen corresponding path program 200 times [2020-10-11 12:51:04,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:04,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124858453] [2020-10-11 12:51:04,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:05,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124858453] [2020-10-11 12:51:05,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870021576] [2020-10-11 12:51:05,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:05,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:51:05,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:05,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:05,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:05,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:05,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:05,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491360861] [2020-10-11 12:51:05,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:05,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:05,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:05,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:05,289 INFO L87 Difference]: Start difference. First operand 267 states and 713 transitions. Second operand 17 states. [2020-10-11 12:51:05,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:05,657 INFO L93 Difference]: Finished difference Result 347 states and 876 transitions. [2020-10-11 12:51:05,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:51:05,658 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:05,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:05,659 INFO L225 Difference]: With dead ends: 347 [2020-10-11 12:51:05,659 INFO L226 Difference]: Without dead ends: 344 [2020-10-11 12:51:05,659 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:51:05,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-11 12:51:05,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 270. [2020-10-11 12:51:05,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-11 12:51:05,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 722 transitions. [2020-10-11 12:51:05,663 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 722 transitions. Word has length 14 [2020-10-11 12:51:05,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:05,663 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 722 transitions. [2020-10-11 12:51:05,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:05,664 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 722 transitions. [2020-10-11 12:51:05,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:05,664 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:05,664 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:05,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-10-11 12:51:05,865 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:05,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:05,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2034085502, now seen corresponding path program 201 times [2020-10-11 12:51:05,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:05,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180894480] [2020-10-11 12:51:05,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:05,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180894480] [2020-10-11 12:51:05,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303426876] [2020-10-11 12:51:05,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:06,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:51:06,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:06,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:06,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:06,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:06,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:06,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238415932] [2020-10-11 12:51:06,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:06,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:06,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:06,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:06,255 INFO L87 Difference]: Start difference. First operand 270 states and 722 transitions. Second operand 17 states. [2020-10-11 12:51:06,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:06,715 INFO L93 Difference]: Finished difference Result 367 states and 918 transitions. [2020-10-11 12:51:06,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:51:06,716 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:06,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:06,716 INFO L225 Difference]: With dead ends: 367 [2020-10-11 12:51:06,716 INFO L226 Difference]: Without dead ends: 363 [2020-10-11 12:51:06,717 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:51:06,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-11 12:51:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 269. [2020-10-11 12:51:06,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-11 12:51:06,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 719 transitions. [2020-10-11 12:51:06,721 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 719 transitions. Word has length 14 [2020-10-11 12:51:06,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:06,721 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 719 transitions. [2020-10-11 12:51:06,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:06,721 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 719 transitions. [2020-10-11 12:51:06,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:06,722 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:06,722 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:06,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:06,923 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:06,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:06,923 INFO L82 PathProgramCache]: Analyzing trace with hash 2034114332, now seen corresponding path program 202 times [2020-10-11 12:51:06,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:06,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798383424] [2020-10-11 12:51:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:07,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798383424] [2020-10-11 12:51:07,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553427435] [2020-10-11 12:51:07,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:07,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:51:07,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:07,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:07,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:07,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:07,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:07,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701590481] [2020-10-11 12:51:07,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:07,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:07,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:07,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:07,540 INFO L87 Difference]: Start difference. First operand 269 states and 719 transitions. Second operand 17 states. [2020-10-11 12:51:08,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:08,233 INFO L93 Difference]: Finished difference Result 391 states and 972 transitions. [2020-10-11 12:51:08,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:51:08,234 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:08,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:08,235 INFO L225 Difference]: With dead ends: 391 [2020-10-11 12:51:08,235 INFO L226 Difference]: Without dead ends: 386 [2020-10-11 12:51:08,236 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:51:08,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-10-11 12:51:08,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 274. [2020-10-11 12:51:08,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-11 12:51:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 732 transitions. [2020-10-11 12:51:08,240 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 732 transitions. Word has length 14 [2020-10-11 12:51:08,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:08,240 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 732 transitions. [2020-10-11 12:51:08,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:08,240 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 732 transitions. [2020-10-11 12:51:08,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:08,240 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:08,240 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:08,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:08,441 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:08,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:08,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2035009023, now seen corresponding path program 203 times [2020-10-11 12:51:08,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:08,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958062029] [2020-10-11 12:51:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:08,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958062029] [2020-10-11 12:51:08,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67095519] [2020-10-11 12:51:08,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:08,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:51:08,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:08,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:08,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:08,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:08,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:08,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:08,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311893179] [2020-10-11 12:51:08,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:08,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:08,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:08,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:08,827 INFO L87 Difference]: Start difference. First operand 274 states and 732 transitions. Second operand 17 states. [2020-10-11 12:51:09,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:09,270 INFO L93 Difference]: Finished difference Result 391 states and 967 transitions. [2020-10-11 12:51:09,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:51:09,271 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:09,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:09,272 INFO L225 Difference]: With dead ends: 391 [2020-10-11 12:51:09,272 INFO L226 Difference]: Without dead ends: 373 [2020-10-11 12:51:09,272 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:51:09,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-11 12:51:09,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 274. [2020-10-11 12:51:09,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-11 12:51:09,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 728 transitions. [2020-10-11 12:51:09,277 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 728 transitions. Word has length 14 [2020-10-11 12:51:09,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:09,277 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 728 transitions. [2020-10-11 12:51:09,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:09,277 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 728 transitions. [2020-10-11 12:51:09,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:09,277 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:09,277 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:09,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:09,478 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:09,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:09,479 INFO L82 PathProgramCache]: Analyzing trace with hash 2062713692, now seen corresponding path program 204 times [2020-10-11 12:51:09,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:09,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726664032] [2020-10-11 12:51:09,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:09,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726664032] [2020-10-11 12:51:09,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120278975] [2020-10-11 12:51:09,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:09,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:51:09,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:09,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:09,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:09,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:09,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:09,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549179517] [2020-10-11 12:51:09,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:09,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:09,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:09,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:09,886 INFO L87 Difference]: Start difference. First operand 274 states and 728 transitions. Second operand 17 states. [2020-10-11 12:51:10,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:10,310 INFO L93 Difference]: Finished difference Result 362 states and 910 transitions. [2020-10-11 12:51:10,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:51:10,311 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:10,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:10,312 INFO L225 Difference]: With dead ends: 362 [2020-10-11 12:51:10,312 INFO L226 Difference]: Without dead ends: 357 [2020-10-11 12:51:10,312 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:51:10,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-11 12:51:10,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 271. [2020-10-11 12:51:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-11 12:51:10,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 721 transitions. [2020-10-11 12:51:10,317 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 721 transitions. Word has length 14 [2020-10-11 12:51:10,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:10,317 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 721 transitions. [2020-10-11 12:51:10,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:10,317 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 721 transitions. [2020-10-11 12:51:10,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:10,317 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:10,317 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:10,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-11 12:51:10,518 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:10,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:10,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2063667004, now seen corresponding path program 205 times [2020-10-11 12:51:10,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:10,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032366086] [2020-10-11 12:51:10,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:10,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032366086] [2020-10-11 12:51:10,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297431017] [2020-10-11 12:51:10,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:10,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:10,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:10,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:10,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:10,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:10,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767626875] [2020-10-11 12:51:10,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:10,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:10,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:10,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:10,949 INFO L87 Difference]: Start difference. First operand 271 states and 721 transitions. Second operand 17 states. [2020-10-11 12:51:11,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:11,187 INFO L93 Difference]: Finished difference Result 339 states and 853 transitions. [2020-10-11 12:51:11,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:51:11,188 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:11,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:11,189 INFO L225 Difference]: With dead ends: 339 [2020-10-11 12:51:11,189 INFO L226 Difference]: Without dead ends: 326 [2020-10-11 12:51:11,189 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-10-11 12:51:11,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-11 12:51:11,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 265. [2020-10-11 12:51:11,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-11 12:51:11,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 709 transitions. [2020-10-11 12:51:11,193 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 709 transitions. Word has length 14 [2020-10-11 12:51:11,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:11,193 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 709 transitions. [2020-10-11 12:51:11,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:11,193 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 709 transitions. [2020-10-11 12:51:11,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:11,194 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:11,194 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:11,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-11 12:51:11,396 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:11,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:11,397 INFO L82 PathProgramCache]: Analyzing trace with hash 313362251, now seen corresponding path program 206 times [2020-10-11 12:51:11,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:11,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745999882] [2020-10-11 12:51:11,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:11,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745999882] [2020-10-11 12:51:11,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733124426] [2020-10-11 12:51:11,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:11,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:51:11,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:11,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:11,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:11,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:11,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:11,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142451412] [2020-10-11 12:51:11,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:11,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:11,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:11,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:11,781 INFO L87 Difference]: Start difference. First operand 265 states and 709 transitions. Second operand 17 states. [2020-10-11 12:51:12,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:12,187 INFO L93 Difference]: Finished difference Result 346 states and 872 transitions. [2020-10-11 12:51:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:51:12,191 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:12,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:12,192 INFO L225 Difference]: With dead ends: 346 [2020-10-11 12:51:12,192 INFO L226 Difference]: Without dead ends: 343 [2020-10-11 12:51:12,192 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:51:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-11 12:51:12,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 267. [2020-10-11 12:51:12,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-11 12:51:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 715 transitions. [2020-10-11 12:51:12,195 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 715 transitions. Word has length 14 [2020-10-11 12:51:12,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:12,196 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 715 transitions. [2020-10-11 12:51:12,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:12,196 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 715 transitions. [2020-10-11 12:51:12,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:12,196 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:12,196 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:12,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-11 12:51:12,397 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:12,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:12,398 INFO L82 PathProgramCache]: Analyzing trace with hash 313363212, now seen corresponding path program 207 times [2020-10-11 12:51:12,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:12,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003664992] [2020-10-11 12:51:12,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:12,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003664992] [2020-10-11 12:51:12,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979901229] [2020-10-11 12:51:12,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:12,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:51:12,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:12,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:12,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:12,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:12,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:12,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:12,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958714393] [2020-10-11 12:51:12,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:12,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:12,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:12,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:12,796 INFO L87 Difference]: Start difference. First operand 267 states and 715 transitions. Second operand 17 states. [2020-10-11 12:51:13,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:13,229 INFO L93 Difference]: Finished difference Result 361 states and 905 transitions. [2020-10-11 12:51:13,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:51:13,230 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:13,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:13,231 INFO L225 Difference]: With dead ends: 361 [2020-10-11 12:51:13,231 INFO L226 Difference]: Without dead ends: 357 [2020-10-11 12:51:13,231 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:51:13,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-11 12:51:13,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 266. [2020-10-11 12:51:13,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-11 12:51:13,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 712 transitions. [2020-10-11 12:51:13,235 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 712 transitions. Word has length 14 [2020-10-11 12:51:13,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:13,235 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 712 transitions. [2020-10-11 12:51:13,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:13,235 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 712 transitions. [2020-10-11 12:51:13,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:13,236 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:13,236 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:13,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-11 12:51:13,437 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:13,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:13,437 INFO L82 PathProgramCache]: Analyzing trace with hash 313392042, now seen corresponding path program 208 times [2020-10-11 12:51:13,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:13,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138302751] [2020-10-11 12:51:13,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:13,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138302751] [2020-10-11 12:51:13,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647419579] [2020-10-11 12:51:13,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:13,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:51:13,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:13,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:13,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:13,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:13,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:13,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138499005] [2020-10-11 12:51:13,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:13,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:13,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:13,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:13,983 INFO L87 Difference]: Start difference. First operand 266 states and 712 transitions. Second operand 17 states. [2020-10-11 12:51:14,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:14,693 INFO L93 Difference]: Finished difference Result 401 states and 990 transitions. [2020-10-11 12:51:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:51:14,694 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:14,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:14,695 INFO L225 Difference]: With dead ends: 401 [2020-10-11 12:51:14,695 INFO L226 Difference]: Without dead ends: 388 [2020-10-11 12:51:14,695 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:51:14,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-11 12:51:14,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 271. [2020-10-11 12:51:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-11 12:51:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 725 transitions. [2020-10-11 12:51:14,704 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 725 transitions. Word has length 14 [2020-10-11 12:51:14,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:14,704 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 725 transitions. [2020-10-11 12:51:14,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:14,704 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 725 transitions. [2020-10-11 12:51:14,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:14,705 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:14,705 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:14,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-11 12:51:14,906 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:14,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:14,906 INFO L82 PathProgramCache]: Analyzing trace with hash 314286733, now seen corresponding path program 209 times [2020-10-11 12:51:14,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:14,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200751821] [2020-10-11 12:51:14,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:15,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200751821] [2020-10-11 12:51:15,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747955970] [2020-10-11 12:51:15,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:15,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:51:15,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:15,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:15,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:15,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:15,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:15,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694571707] [2020-10-11 12:51:15,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:15,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:15,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:15,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:15,262 INFO L87 Difference]: Start difference. First operand 271 states and 725 transitions. Second operand 17 states. [2020-10-11 12:51:15,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:15,801 INFO L93 Difference]: Finished difference Result 381 states and 946 transitions. [2020-10-11 12:51:15,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:51:15,802 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:15,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:15,803 INFO L225 Difference]: With dead ends: 381 [2020-10-11 12:51:15,803 INFO L226 Difference]: Without dead ends: 363 [2020-10-11 12:51:15,803 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:51:15,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-11 12:51:15,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 270. [2020-10-11 12:51:15,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-11 12:51:15,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 719 transitions. [2020-10-11 12:51:15,808 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 719 transitions. Word has length 14 [2020-10-11 12:51:15,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:15,808 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 719 transitions. [2020-10-11 12:51:15,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:15,808 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 719 transitions. [2020-10-11 12:51:15,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:15,809 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:15,809 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:16,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-10-11 12:51:16,009 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:16,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:16,010 INFO L82 PathProgramCache]: Analyzing trace with hash 950591741, now seen corresponding path program 210 times [2020-10-11 12:51:16,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:16,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467489410] [2020-10-11 12:51:16,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:16,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467489410] [2020-10-11 12:51:16,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664043912] [2020-10-11 12:51:16,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:16,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 12:51:16,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:16,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:16,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:16,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:16,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:16,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772579786] [2020-10-11 12:51:16,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:16,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:16,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:16,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:16,382 INFO L87 Difference]: Start difference. First operand 270 states and 719 transitions. Second operand 17 states. [2020-10-11 12:51:16,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:16,921 INFO L93 Difference]: Finished difference Result 354 states and 884 transitions. [2020-10-11 12:51:16,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:51:16,922 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:16,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:16,923 INFO L225 Difference]: With dead ends: 354 [2020-10-11 12:51:16,923 INFO L226 Difference]: Without dead ends: 351 [2020-10-11 12:51:16,923 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:51:16,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-11 12:51:16,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 271. [2020-10-11 12:51:16,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-11 12:51:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 722 transitions. [2020-10-11 12:51:16,927 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 722 transitions. Word has length 14 [2020-10-11 12:51:16,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:16,927 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 722 transitions. [2020-10-11 12:51:16,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:16,928 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 722 transitions. [2020-10-11 12:51:16,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:16,928 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:16,928 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:17,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-11 12:51:17,129 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:17,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:17,129 INFO L82 PathProgramCache]: Analyzing trace with hash 950592702, now seen corresponding path program 211 times [2020-10-11 12:51:17,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:17,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337735297] [2020-10-11 12:51:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:17,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337735297] [2020-10-11 12:51:17,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092342457] [2020-10-11 12:51:17,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:17,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:17,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:17,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:17,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:17,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075676229] [2020-10-11 12:51:17,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:17,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:17,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:17,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:17,509 INFO L87 Difference]: Start difference. First operand 271 states and 722 transitions. Second operand 17 states. [2020-10-11 12:51:18,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:18,031 INFO L93 Difference]: Finished difference Result 359 states and 897 transitions. [2020-10-11 12:51:18,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:51:18,032 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:18,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:18,033 INFO L225 Difference]: With dead ends: 359 [2020-10-11 12:51:18,033 INFO L226 Difference]: Without dead ends: 355 [2020-10-11 12:51:18,033 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:51:18,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-11 12:51:18,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 270. [2020-10-11 12:51:18,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-11 12:51:18,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 719 transitions. [2020-10-11 12:51:18,039 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 719 transitions. Word has length 14 [2020-10-11 12:51:18,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:18,039 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 719 transitions. [2020-10-11 12:51:18,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:18,039 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 719 transitions. [2020-10-11 12:51:18,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:18,040 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:18,040 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:18,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-10-11 12:51:18,245 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:18,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:18,245 INFO L82 PathProgramCache]: Analyzing trace with hash 950621532, now seen corresponding path program 212 times [2020-10-11 12:51:18,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:18,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928741234] [2020-10-11 12:51:18,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:18,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928741234] [2020-10-11 12:51:18,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143996501] [2020-10-11 12:51:18,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:18,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:51:18,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:18,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:18,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:19,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:19,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:19,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243507089] [2020-10-11 12:51:19,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:19,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:19,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:19,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:19,793 INFO L87 Difference]: Start difference. First operand 270 states and 719 transitions. Second operand 17 states. [2020-10-11 12:51:20,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:20,584 INFO L93 Difference]: Finished difference Result 386 states and 956 transitions. [2020-10-11 12:51:20,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:51:20,585 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:20,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:20,586 INFO L225 Difference]: With dead ends: 386 [2020-10-11 12:51:20,586 INFO L226 Difference]: Without dead ends: 381 [2020-10-11 12:51:20,586 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:51:20,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-10-11 12:51:20,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 269. [2020-10-11 12:51:20,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-11 12:51:20,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 715 transitions. [2020-10-11 12:51:20,590 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 715 transitions. Word has length 14 [2020-10-11 12:51:20,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:20,590 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 715 transitions. [2020-10-11 12:51:20,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:20,590 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 715 transitions. [2020-10-11 12:51:20,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:20,590 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:20,591 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:20,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:20,791 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:20,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:20,792 INFO L82 PathProgramCache]: Analyzing trace with hash 971147531, now seen corresponding path program 213 times [2020-10-11 12:51:20,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:20,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567050362] [2020-10-11 12:51:20,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:20,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567050362] [2020-10-11 12:51:20,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451220341] [2020-10-11 12:51:20,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:20,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:51:20,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:20,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:20,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:21,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:21,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:21,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550287663] [2020-10-11 12:51:21,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:21,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:21,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:21,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:21,169 INFO L87 Difference]: Start difference. First operand 269 states and 715 transitions. Second operand 17 states. [2020-10-11 12:51:21,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:21,841 INFO L93 Difference]: Finished difference Result 348 states and 872 transitions. [2020-10-11 12:51:21,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:51:21,842 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:21,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:21,843 INFO L225 Difference]: With dead ends: 348 [2020-10-11 12:51:21,843 INFO L226 Difference]: Without dead ends: 345 [2020-10-11 12:51:21,843 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:51:21,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-11 12:51:21,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 269. [2020-10-11 12:51:21,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-11 12:51:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 715 transitions. [2020-10-11 12:51:21,848 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 715 transitions. Word has length 14 [2020-10-11 12:51:21,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:21,848 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 715 transitions. [2020-10-11 12:51:21,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:21,848 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 715 transitions. [2020-10-11 12:51:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:21,848 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:21,848 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:22,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:22,049 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:22,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:22,050 INFO L82 PathProgramCache]: Analyzing trace with hash 971148492, now seen corresponding path program 214 times [2020-10-11 12:51:22,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:22,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602611573] [2020-10-11 12:51:22,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:22,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602611573] [2020-10-11 12:51:22,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714034517] [2020-10-11 12:51:22,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:22,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:51:22,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:22,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:22,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:22,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:22,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:22,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386851792] [2020-10-11 12:51:22,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:22,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:22,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:22,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:22,435 INFO L87 Difference]: Start difference. First operand 269 states and 715 transitions. Second operand 17 states. [2020-10-11 12:51:23,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:23,101 INFO L93 Difference]: Finished difference Result 350 states and 873 transitions. [2020-10-11 12:51:23,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:51:23,102 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:23,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:23,103 INFO L225 Difference]: With dead ends: 350 [2020-10-11 12:51:23,103 INFO L226 Difference]: Without dead ends: 346 [2020-10-11 12:51:23,103 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:51:23,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-11 12:51:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2020-10-11 12:51:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-11 12:51:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 714 transitions. [2020-10-11 12:51:23,108 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 714 transitions. Word has length 14 [2020-10-11 12:51:23,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:23,108 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 714 transitions. [2020-10-11 12:51:23,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 714 transitions. [2020-10-11 12:51:23,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:23,109 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:23,109 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:23,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:23,320 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:23,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:23,320 INFO L82 PathProgramCache]: Analyzing trace with hash 971810621, now seen corresponding path program 215 times [2020-10-11 12:51:23,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:23,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734158353] [2020-10-11 12:51:23,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:23,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734158353] [2020-10-11 12:51:23,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487510414] [2020-10-11 12:51:23,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:23,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 12:51:23,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:23,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:23,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:23,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:23,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:23,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791245851] [2020-10-11 12:51:23,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:23,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:23,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:23,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:23,690 INFO L87 Difference]: Start difference. First operand 269 states and 714 transitions. Second operand 17 states. [2020-10-11 12:51:24,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:24,445 INFO L93 Difference]: Finished difference Result 334 states and 840 transitions. [2020-10-11 12:51:24,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:51:24,446 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:24,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:24,447 INFO L225 Difference]: With dead ends: 334 [2020-10-11 12:51:24,447 INFO L226 Difference]: Without dead ends: 331 [2020-10-11 12:51:24,447 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=324, Invalid=798, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:51:24,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-11 12:51:24,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 269. [2020-10-11 12:51:24,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-11 12:51:24,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 713 transitions. [2020-10-11 12:51:24,451 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 713 transitions. Word has length 14 [2020-10-11 12:51:24,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:24,451 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 713 transitions. [2020-10-11 12:51:24,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:24,451 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 713 transitions. [2020-10-11 12:51:24,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:24,451 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:24,451 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:24,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-11 12:51:24,652 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:24,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:24,653 INFO L82 PathProgramCache]: Analyzing trace with hash 971831980, now seen corresponding path program 216 times [2020-10-11 12:51:24,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:24,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313678316] [2020-10-11 12:51:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:24,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313678316] [2020-10-11 12:51:24,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163057567] [2020-10-11 12:51:24,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:24,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:51:24,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:24,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:24,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:24,970 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:51:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:24,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:24,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:24,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190241599] [2020-10-11 12:51:24,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:24,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:24,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:24,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:24,986 INFO L87 Difference]: Start difference. First operand 269 states and 713 transitions. Second operand 17 states. [2020-10-11 12:51:25,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:25,454 INFO L93 Difference]: Finished difference Result 284 states and 731 transitions. [2020-10-11 12:51:25,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:51:25,455 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:25,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:25,456 INFO L225 Difference]: With dead ends: 284 [2020-10-11 12:51:25,456 INFO L226 Difference]: Without dead ends: 274 [2020-10-11 12:51:25,456 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:51:25,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-11 12:51:25,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 261. [2020-10-11 12:51:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-11 12:51:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 686 transitions. [2020-10-11 12:51:25,460 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 686 transitions. Word has length 14 [2020-10-11 12:51:25,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:25,460 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 686 transitions. [2020-10-11 12:51:25,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:25,460 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 686 transitions. [2020-10-11 12:51:25,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:25,461 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:25,461 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:25,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:25,661 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:25,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:25,662 INFO L82 PathProgramCache]: Analyzing trace with hash 971832941, now seen corresponding path program 217 times [2020-10-11 12:51:25,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:25,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790819034] [2020-10-11 12:51:25,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:25,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790819034] [2020-10-11 12:51:25,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827009222] [2020-10-11 12:51:25,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:25,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:25,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:26,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:51:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:26,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:26,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:26,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857619245] [2020-10-11 12:51:26,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:26,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:26,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:26,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:26,059 INFO L87 Difference]: Start difference. First operand 261 states and 686 transitions. Second operand 17 states. [2020-10-11 12:51:27,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:27,037 INFO L93 Difference]: Finished difference Result 365 states and 917 transitions. [2020-10-11 12:51:27,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:51:27,038 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:27,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:27,039 INFO L225 Difference]: With dead ends: 365 [2020-10-11 12:51:27,039 INFO L226 Difference]: Without dead ends: 360 [2020-10-11 12:51:27,039 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 12:51:27,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-11 12:51:27,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 259. [2020-10-11 12:51:27,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-11 12:51:27,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 680 transitions. [2020-10-11 12:51:27,043 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 680 transitions. Word has length 14 [2020-10-11 12:51:27,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:27,043 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 680 transitions. [2020-10-11 12:51:27,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:27,043 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 680 transitions. [2020-10-11 12:51:27,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:27,044 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:27,044 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:27,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-11 12:51:27,244 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:27,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:27,245 INFO L82 PathProgramCache]: Analyzing trace with hash 971840412, now seen corresponding path program 218 times [2020-10-11 12:51:27,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:27,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095852571] [2020-10-11 12:51:27,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:27,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095852571] [2020-10-11 12:51:27,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368754307] [2020-10-11 12:51:27,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:27,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:51:27,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:27,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:27,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:27,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:27,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:27,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787840939] [2020-10-11 12:51:27,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:27,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:27,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:27,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:27,685 INFO L87 Difference]: Start difference. First operand 259 states and 680 transitions. Second operand 17 states. [2020-10-11 12:51:28,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:28,536 INFO L93 Difference]: Finished difference Result 357 states and 889 transitions. [2020-10-11 12:51:28,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 12:51:28,538 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:28,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:28,538 INFO L225 Difference]: With dead ends: 357 [2020-10-11 12:51:28,538 INFO L226 Difference]: Without dead ends: 353 [2020-10-11 12:51:28,539 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-10-11 12:51:28,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-11 12:51:28,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 261. [2020-10-11 12:51:28,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-11 12:51:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 687 transitions. [2020-10-11 12:51:28,542 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 687 transitions. Word has length 14 [2020-10-11 12:51:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:28,542 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 687 transitions. [2020-10-11 12:51:28,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 687 transitions. [2020-10-11 12:51:28,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:28,542 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:28,542 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:28,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-11 12:51:28,743 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:28,744 INFO L82 PathProgramCache]: Analyzing trace with hash 971861771, now seen corresponding path program 219 times [2020-10-11 12:51:28,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:28,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135607257] [2020-10-11 12:51:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:28,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135607257] [2020-10-11 12:51:28,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908983808] [2020-10-11 12:51:28,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:28,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:51:28,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:28,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:28,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:29,100 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:51:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:29,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:29,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:29,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677560388] [2020-10-11 12:51:29,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:29,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:29,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:29,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:29,141 INFO L87 Difference]: Start difference. First operand 261 states and 687 transitions. Second operand 17 states. [2020-10-11 12:51:30,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:30,320 INFO L93 Difference]: Finished difference Result 385 states and 962 transitions. [2020-10-11 12:51:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:51:30,321 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:30,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:30,321 INFO L225 Difference]: With dead ends: 385 [2020-10-11 12:51:30,321 INFO L226 Difference]: Without dead ends: 380 [2020-10-11 12:51:30,322 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 12:51:30,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-11 12:51:30,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 261. [2020-10-11 12:51:30,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-11 12:51:30,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 687 transitions. [2020-10-11 12:51:30,326 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 687 transitions. Word has length 14 [2020-10-11 12:51:30,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:30,326 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 687 transitions. [2020-10-11 12:51:30,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:30,326 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 687 transitions. [2020-10-11 12:51:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:30,326 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:30,327 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:30,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:30,527 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:30,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:30,528 INFO L82 PathProgramCache]: Analyzing trace with hash 971862732, now seen corresponding path program 220 times [2020-10-11 12:51:30,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:30,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081642290] [2020-10-11 12:51:30,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:30,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081642290] [2020-10-11 12:51:30,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819723298] [2020-10-11 12:51:30,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:30,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:51:30,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:30,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:30,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:30,890 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:51:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:30,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:30,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:30,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894688217] [2020-10-11 12:51:30,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:30,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:30,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:30,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:30,917 INFO L87 Difference]: Start difference. First operand 261 states and 687 transitions. Second operand 17 states. [2020-10-11 12:51:32,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:32,058 INFO L93 Difference]: Finished difference Result 385 states and 962 transitions. [2020-10-11 12:51:32,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:51:32,059 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:32,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:32,060 INFO L225 Difference]: With dead ends: 385 [2020-10-11 12:51:32,060 INFO L226 Difference]: Without dead ends: 379 [2020-10-11 12:51:32,060 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 12:51:32,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-11 12:51:32,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 257. [2020-10-11 12:51:32,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-11 12:51:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 674 transitions. [2020-10-11 12:51:32,065 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 674 transitions. Word has length 14 [2020-10-11 12:51:32,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:32,065 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 674 transitions. [2020-10-11 12:51:32,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 674 transitions. [2020-10-11 12:51:32,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:32,065 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:32,066 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:32,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:32,276 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:32,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:32,276 INFO L82 PathProgramCache]: Analyzing trace with hash 972071052, now seen corresponding path program 221 times [2020-10-11 12:51:32,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:32,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672792857] [2020-10-11 12:51:32,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:32,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672792857] [2020-10-11 12:51:32,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944629961] [2020-10-11 12:51:32,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:32,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:51:32,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:32,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:32,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:32,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:32,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:32,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065434566] [2020-10-11 12:51:32,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:32,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:32,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:32,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:32,735 INFO L87 Difference]: Start difference. First operand 257 states and 674 transitions. Second operand 17 states. [2020-10-11 12:51:33,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:33,776 INFO L93 Difference]: Finished difference Result 398 states and 973 transitions. [2020-10-11 12:51:33,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:51:33,777 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:33,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:33,778 INFO L225 Difference]: With dead ends: 398 [2020-10-11 12:51:33,778 INFO L226 Difference]: Without dead ends: 380 [2020-10-11 12:51:33,778 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 12:51:33,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-11 12:51:33,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 264. [2020-10-11 12:51:33,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-11 12:51:33,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 694 transitions. [2020-10-11 12:51:33,781 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 694 transitions. Word has length 14 [2020-10-11 12:51:33,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:33,781 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 694 transitions. [2020-10-11 12:51:33,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:33,782 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 694 transitions. [2020-10-11 12:51:33,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:33,782 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:33,782 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:33,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-10-11 12:51:33,983 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:33,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:33,983 INFO L82 PathProgramCache]: Analyzing trace with hash 972734142, now seen corresponding path program 222 times [2020-10-11 12:51:33,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:33,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506081622] [2020-10-11 12:51:33,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:34,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506081622] [2020-10-11 12:51:34,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530399088] [2020-10-11 12:51:34,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:34,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:51:34,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:34,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:34,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:34,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:34,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:34,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317885151] [2020-10-11 12:51:34,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:34,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:34,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:34,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:34,432 INFO L87 Difference]: Start difference. First operand 264 states and 694 transitions. Second operand 17 states. [2020-10-11 12:51:35,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:35,586 INFO L93 Difference]: Finished difference Result 380 states and 942 transitions. [2020-10-11 12:51:35,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:51:35,587 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:35,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:35,588 INFO L225 Difference]: With dead ends: 380 [2020-10-11 12:51:35,588 INFO L226 Difference]: Without dead ends: 375 [2020-10-11 12:51:35,588 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 12:51:35,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-11 12:51:35,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 268. [2020-10-11 12:51:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-11 12:51:35,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 708 transitions. [2020-10-11 12:51:35,593 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 708 transitions. Word has length 14 [2020-10-11 12:51:35,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:35,593 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 708 transitions. [2020-10-11 12:51:35,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:35,593 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 708 transitions. [2020-10-11 12:51:35,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:35,593 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:35,593 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:35,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:35,794 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:35,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:35,795 INFO L82 PathProgramCache]: Analyzing trace with hash 972755501, now seen corresponding path program 223 times [2020-10-11 12:51:35,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:35,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723848675] [2020-10-11 12:51:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:35,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723848675] [2020-10-11 12:51:35,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044509695] [2020-10-11 12:51:35,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:35,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:35,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:36,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:51:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:36,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:36,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:36,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197811323] [2020-10-11 12:51:36,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:36,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:36,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:36,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:36,236 INFO L87 Difference]: Start difference. First operand 268 states and 708 transitions. Second operand 17 states. [2020-10-11 12:51:37,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:37,761 INFO L93 Difference]: Finished difference Result 376 states and 942 transitions. [2020-10-11 12:51:37,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:51:37,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:37,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:37,763 INFO L225 Difference]: With dead ends: 376 [2020-10-11 12:51:37,763 INFO L226 Difference]: Without dead ends: 367 [2020-10-11 12:51:37,763 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 12:51:37,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-11 12:51:37,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 270. [2020-10-11 12:51:37,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-11 12:51:37,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 718 transitions. [2020-10-11 12:51:37,767 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 718 transitions. Word has length 14 [2020-10-11 12:51:37,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:37,767 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 718 transitions. [2020-10-11 12:51:37,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:37,768 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 718 transitions. [2020-10-11 12:51:37,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:37,768 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:37,768 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:37,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2020-10-11 12:51:37,969 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:37,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:37,970 INFO L82 PathProgramCache]: Analyzing trace with hash 972756462, now seen corresponding path program 224 times [2020-10-11 12:51:37,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:37,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690568338] [2020-10-11 12:51:37,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:38,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690568338] [2020-10-11 12:51:38,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248603965] [2020-10-11 12:51:38,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:51:38,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:51:38,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:38,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:38,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:42,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:51:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:42,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:42,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:42,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586676145] [2020-10-11 12:51:42,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:42,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:42,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:42,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=190, Unknown=2, NotChecked=0, Total=272 [2020-10-11 12:51:42,565 INFO L87 Difference]: Start difference. First operand 270 states and 718 transitions. Second operand 17 states. [2020-10-11 12:51:47,424 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-11 12:51:51,584 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-11 12:51:55,830 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-11 12:52:00,070 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-11 12:52:02,159 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-11 12:52:06,634 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-11 12:52:07,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:07,364 INFO L93 Difference]: Finished difference Result 424 states and 1059 transitions. [2020-10-11 12:52:07,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 12:52:07,366 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:07,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:07,367 INFO L225 Difference]: With dead ends: 424 [2020-10-11 12:52:07,367 INFO L226 Difference]: Without dead ends: 414 [2020-10-11 12:52:07,367 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=530, Invalid=1274, Unknown=2, NotChecked=0, Total=1806 [2020-10-11 12:52:07,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-10-11 12:52:07,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 264. [2020-10-11 12:52:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-11 12:52:07,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 700 transitions. [2020-10-11 12:52:07,371 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 700 transitions. Word has length 14 [2020-10-11 12:52:07,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:07,371 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 700 transitions. [2020-10-11 12:52:07,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:07,371 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 700 transitions. [2020-10-11 12:52:07,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:07,372 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:07,372 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:07,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:07,574 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:07,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:07,574 INFO L82 PathProgramCache]: Analyzing trace with hash 972785292, now seen corresponding path program 225 times [2020-10-11 12:52:07,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:07,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891242989] [2020-10-11 12:52:07,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:07,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891242989] [2020-10-11 12:52:07,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959418063] [2020-10-11 12:52:07,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:07,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:52:07,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:07,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:07,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:07,973 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:52:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:08,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:08,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:08,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634176666] [2020-10-11 12:52:08,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:08,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:08,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:08,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:08,007 INFO L87 Difference]: Start difference. First operand 264 states and 700 transitions. Second operand 17 states. [2020-10-11 12:52:09,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:09,854 INFO L93 Difference]: Finished difference Result 424 states and 1057 transitions. [2020-10-11 12:52:09,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:52:09,855 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:09,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:09,856 INFO L225 Difference]: With dead ends: 424 [2020-10-11 12:52:09,857 INFO L226 Difference]: Without dead ends: 414 [2020-10-11 12:52:09,857 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 12:52:09,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-10-11 12:52:09,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 263. [2020-10-11 12:52:09,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-11 12:52:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 696 transitions. [2020-10-11 12:52:09,861 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 696 transitions. Word has length 14 [2020-10-11 12:52:09,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:09,861 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 696 transitions. [2020-10-11 12:52:09,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:09,861 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 696 transitions. [2020-10-11 12:52:09,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:09,862 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:09,862 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:10,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:10,063 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:10,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:10,063 INFO L82 PathProgramCache]: Analyzing trace with hash 979221853, now seen corresponding path program 226 times [2020-10-11 12:52:10,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:10,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527614467] [2020-10-11 12:52:10,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:10,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527614467] [2020-10-11 12:52:10,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33443516] [2020-10-11 12:52:10,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:10,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:52:10,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:10,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:10,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:10,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:10,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:10,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314343871] [2020-10-11 12:52:10,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:10,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:10,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:10,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:10,443 INFO L87 Difference]: Start difference. First operand 263 states and 696 transitions. Second operand 17 states. [2020-10-11 12:52:11,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:11,118 INFO L93 Difference]: Finished difference Result 374 states and 921 transitions. [2020-10-11 12:52:11,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:52:11,120 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:11,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:11,127 INFO L225 Difference]: With dead ends: 374 [2020-10-11 12:52:11,128 INFO L226 Difference]: Without dead ends: 360 [2020-10-11 12:52:11,128 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:52:11,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-11 12:52:11,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 263. [2020-10-11 12:52:11,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-11 12:52:11,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 696 transitions. [2020-10-11 12:52:11,131 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 696 transitions. Word has length 14 [2020-10-11 12:52:11,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:11,131 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 696 transitions. [2020-10-11 12:52:11,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:11,131 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 696 transitions. [2020-10-11 12:52:11,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:11,132 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:11,132 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:11,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:11,339 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:11,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:11,340 INFO L82 PathProgramCache]: Analyzing trace with hash 999776682, now seen corresponding path program 227 times [2020-10-11 12:52:11,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:11,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498632260] [2020-10-11 12:52:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:11,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498632260] [2020-10-11 12:52:11,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717737130] [2020-10-11 12:52:11,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:11,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:52:11,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:11,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:11,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:11,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:11,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:11,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722923850] [2020-10-11 12:52:11,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:11,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:11,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:11,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:11,740 INFO L87 Difference]: Start difference. First operand 263 states and 696 transitions. Second operand 17 states. [2020-10-11 12:52:12,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:12,795 INFO L93 Difference]: Finished difference Result 399 states and 977 transitions. [2020-10-11 12:52:12,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 12:52:12,798 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:12,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:12,799 INFO L225 Difference]: With dead ends: 399 [2020-10-11 12:52:12,799 INFO L226 Difference]: Without dead ends: 394 [2020-10-11 12:52:12,800 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=389, Invalid=943, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 12:52:12,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-10-11 12:52:12,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 256. [2020-10-11 12:52:12,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-11 12:52:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 681 transitions. [2020-10-11 12:52:12,804 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 681 transitions. Word has length 14 [2020-10-11 12:52:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:12,804 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 681 transitions. [2020-10-11 12:52:12,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 681 transitions. [2020-10-11 12:52:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:12,805 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:12,805 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:13,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-11 12:52:13,009 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:13,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:13,010 INFO L82 PathProgramCache]: Analyzing trace with hash 999777643, now seen corresponding path program 228 times [2020-10-11 12:52:13,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:13,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452938333] [2020-10-11 12:52:13,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:13,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452938333] [2020-10-11 12:52:13,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668953871] [2020-10-11 12:52:13,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:13,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:52:13,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:13,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:13,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:13,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:13,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:13,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147800963] [2020-10-11 12:52:13,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:13,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:13,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:13,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:13,392 INFO L87 Difference]: Start difference. First operand 256 states and 681 transitions. Second operand 17 states. [2020-10-11 12:52:14,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:14,249 INFO L93 Difference]: Finished difference Result 396 states and 966 transitions. [2020-10-11 12:52:14,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:52:14,250 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:14,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:14,251 INFO L225 Difference]: With dead ends: 396 [2020-10-11 12:52:14,251 INFO L226 Difference]: Without dead ends: 382 [2020-10-11 12:52:14,251 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=316, Invalid=806, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:52:14,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-10-11 12:52:14,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 254. [2020-10-11 12:52:14,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-11 12:52:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 675 transitions. [2020-10-11 12:52:14,255 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 675 transitions. Word has length 14 [2020-10-11 12:52:14,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:14,256 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 675 transitions. [2020-10-11 12:52:14,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:14,256 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 675 transitions. [2020-10-11 12:52:14,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:14,256 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:14,256 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:14,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-11 12:52:14,457 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:14,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:14,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1000439772, now seen corresponding path program 229 times [2020-10-11 12:52:14,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:14,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949231756] [2020-10-11 12:52:14,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:14,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949231756] [2020-10-11 12:52:14,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051354349] [2020-10-11 12:52:14,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:14,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:14,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:14,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:14,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:14,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:14,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812698075] [2020-10-11 12:52:14,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:14,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:14,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:14,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:14,859 INFO L87 Difference]: Start difference. First operand 254 states and 675 transitions. Second operand 17 states. [2020-10-11 12:52:15,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:15,942 INFO L93 Difference]: Finished difference Result 380 states and 942 transitions. [2020-10-11 12:52:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 12:52:15,944 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:15,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:15,944 INFO L225 Difference]: With dead ends: 380 [2020-10-11 12:52:15,944 INFO L226 Difference]: Without dead ends: 375 [2020-10-11 12:52:15,945 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 12:52:15,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-11 12:52:15,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 256. [2020-10-11 12:52:15,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-11 12:52:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 681 transitions. [2020-10-11 12:52:15,949 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 681 transitions. Word has length 14 [2020-10-11 12:52:15,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:15,949 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 681 transitions. [2020-10-11 12:52:15,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:15,949 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 681 transitions. [2020-10-11 12:52:15,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:15,950 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:15,950 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:16,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-10-11 12:52:16,152 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:16,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:16,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1000461131, now seen corresponding path program 230 times [2020-10-11 12:52:16,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:16,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904087152] [2020-10-11 12:52:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:16,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904087152] [2020-10-11 12:52:16,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992106688] [2020-10-11 12:52:16,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:16,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:52:16,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:16,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:16,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:16,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:52:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:16,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:16,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:16,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934222870] [2020-10-11 12:52:16,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:16,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:16,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:16,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:16,522 INFO L87 Difference]: Start difference. First operand 256 states and 681 transitions. Second operand 17 states. [2020-10-11 12:52:17,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:17,543 INFO L93 Difference]: Finished difference Result 352 states and 887 transitions. [2020-10-11 12:52:17,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 12:52:17,544 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:17,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:17,545 INFO L225 Difference]: With dead ends: 352 [2020-10-11 12:52:17,545 INFO L226 Difference]: Without dead ends: 342 [2020-10-11 12:52:17,545 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 12:52:17,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-11 12:52:17,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 253. [2020-10-11 12:52:17,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-11 12:52:17,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 667 transitions. [2020-10-11 12:52:17,549 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 667 transitions. Word has length 14 [2020-10-11 12:52:17,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:17,549 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 667 transitions. [2020-10-11 12:52:17,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:17,549 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 667 transitions. [2020-10-11 12:52:17,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:17,550 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:17,550 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:17,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-10-11 12:52:17,751 INFO L429 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:17,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:17,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1000462092, now seen corresponding path program 231 times [2020-10-11 12:52:17,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:17,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222150768] [2020-10-11 12:52:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:17,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222150768] [2020-10-11 12:52:17,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424237858] [2020-10-11 12:52:17,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:17,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:52:17,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:17,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:17,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:18,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:52:18,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:18,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:18,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:18,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116500810] [2020-10-11 12:52:18,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:18,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:18,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:18,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:18,202 INFO L87 Difference]: Start difference. First operand 253 states and 667 transitions. Second operand 17 states. [2020-10-11 12:52:19,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:19,531 INFO L93 Difference]: Finished difference Result 421 states and 1043 transitions. [2020-10-11 12:52:19,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 12:52:19,533 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:19,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:19,534 INFO L225 Difference]: With dead ends: 421 [2020-10-11 12:52:19,534 INFO L226 Difference]: Without dead ends: 410 [2020-10-11 12:52:19,535 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 12:52:19,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-11 12:52:19,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 249. [2020-10-11 12:52:19,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-11 12:52:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 653 transitions. [2020-10-11 12:52:19,539 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 653 transitions. Word has length 14 [2020-10-11 12:52:19,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:19,539 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 653 transitions. [2020-10-11 12:52:19,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:19,539 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 653 transitions. [2020-10-11 12:52:19,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:19,539 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:19,539 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:19,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2020-10-11 12:52:19,740 INFO L429 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:19,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:19,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1000469563, now seen corresponding path program 232 times [2020-10-11 12:52:19,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:19,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807579527] [2020-10-11 12:52:19,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:19,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807579527] [2020-10-11 12:52:19,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521152703] [2020-10-11 12:52:19,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:19,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:52:19,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:19,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:19,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:20,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:20,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:20,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449620306] [2020-10-11 12:52:20,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:20,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:20,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:20,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:20,137 INFO L87 Difference]: Start difference. First operand 249 states and 653 transitions. Second operand 17 states. [2020-10-11 12:52:21,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:21,117 INFO L93 Difference]: Finished difference Result 402 states and 976 transitions. [2020-10-11 12:52:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 12:52:21,119 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:21,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:21,119 INFO L225 Difference]: With dead ends: 402 [2020-10-11 12:52:21,119 INFO L226 Difference]: Without dead ends: 389 [2020-10-11 12:52:21,120 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 12:52:21,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-11 12:52:21,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 251. [2020-10-11 12:52:21,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-11 12:52:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 658 transitions. [2020-10-11 12:52:21,124 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 658 transitions. Word has length 14 [2020-10-11 12:52:21,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:21,124 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 658 transitions. [2020-10-11 12:52:21,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:21,124 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 658 transitions. [2020-10-11 12:52:21,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:21,124 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:21,125 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:21,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:21,325 INFO L429 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:21,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:21,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1000490922, now seen corresponding path program 233 times [2020-10-11 12:52:21,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:21,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649794779] [2020-10-11 12:52:21,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:21,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649794779] [2020-10-11 12:52:21,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742198981] [2020-10-11 12:52:21,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:21,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:52:21,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:21,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:21,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:21,698 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:52:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:21,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:21,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:21,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252474803] [2020-10-11 12:52:21,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:21,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:21,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:21,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:21,718 INFO L87 Difference]: Start difference. First operand 251 states and 658 transitions. Second operand 17 states. [2020-10-11 12:52:22,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:22,896 INFO L93 Difference]: Finished difference Result 422 states and 1042 transitions. [2020-10-11 12:52:22,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 12:52:22,897 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:22,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:22,898 INFO L225 Difference]: With dead ends: 422 [2020-10-11 12:52:22,898 INFO L226 Difference]: Without dead ends: 411 [2020-10-11 12:52:22,898 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 12:52:22,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-11 12:52:22,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 249. [2020-10-11 12:52:22,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-11 12:52:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 648 transitions. [2020-10-11 12:52:22,902 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 648 transitions. Word has length 14 [2020-10-11 12:52:22,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:22,902 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 648 transitions. [2020-10-11 12:52:22,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:22,902 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 648 transitions. [2020-10-11 12:52:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:22,902 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:22,903 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:23,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:23,103 INFO L429 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:23,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:23,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1000491883, now seen corresponding path program 234 times [2020-10-11 12:52:23,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:23,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277167258] [2020-10-11 12:52:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:23,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277167258] [2020-10-11 12:52:23,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082500329] [2020-10-11 12:52:23,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:23,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:52:23,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:23,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:23,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:23,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:52:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:23,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:23,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:23,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415404468] [2020-10-11 12:52:23,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:23,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:23,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:23,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:23,555 INFO L87 Difference]: Start difference. First operand 249 states and 648 transitions. Second operand 17 states. [2020-10-11 12:52:24,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:24,905 INFO L93 Difference]: Finished difference Result 424 states and 1036 transitions. [2020-10-11 12:52:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:52:24,907 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:24,907 INFO L225 Difference]: With dead ends: 424 [2020-10-11 12:52:24,907 INFO L226 Difference]: Without dead ends: 396 [2020-10-11 12:52:24,907 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 12:52:24,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-11 12:52:24,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 238. [2020-10-11 12:52:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-11 12:52:24,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 612 transitions. [2020-10-11 12:52:24,911 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 612 transitions. Word has length 14 [2020-10-11 12:52:24,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:24,912 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 612 transitions. [2020-10-11 12:52:24,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:24,912 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 612 transitions. [2020-10-11 12:52:24,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:24,912 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:24,912 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:25,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:25,113 INFO L429 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:25,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:25,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1001384652, now seen corresponding path program 235 times [2020-10-11 12:52:25,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:25,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781552860] [2020-10-11 12:52:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:25,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781552860] [2020-10-11 12:52:25,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909695598] [2020-10-11 12:52:25,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:25,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:25,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:25,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:52:25,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:25,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:25,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:25,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462867261] [2020-10-11 12:52:25,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:25,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:25,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:25,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:25,533 INFO L87 Difference]: Start difference. First operand 238 states and 612 transitions. Second operand 17 states. [2020-10-11 12:52:27,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:27,039 INFO L93 Difference]: Finished difference Result 369 states and 896 transitions. [2020-10-11 12:52:27,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:52:27,041 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:27,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:27,042 INFO L225 Difference]: With dead ends: 369 [2020-10-11 12:52:27,042 INFO L226 Difference]: Without dead ends: 359 [2020-10-11 12:52:27,042 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 12:52:27,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-11 12:52:27,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 228. [2020-10-11 12:52:27,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-11 12:52:27,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 568 transitions. [2020-10-11 12:52:27,047 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 568 transitions. Word has length 14 [2020-10-11 12:52:27,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:27,047 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 568 transitions. [2020-10-11 12:52:27,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:27,047 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 568 transitions. [2020-10-11 12:52:27,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:27,048 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:27,048 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:27,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2020-10-11 12:52:27,260 INFO L429 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:27,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:27,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1866754364, now seen corresponding path program 236 times [2020-10-11 12:52:27,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:27,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049393446] [2020-10-11 12:52:27,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:27,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049393446] [2020-10-11 12:52:27,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31656825] [2020-10-11 12:52:27,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:27,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:52:27,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:27,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:27,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:27,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:27,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:27,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244066466] [2020-10-11 12:52:27,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:27,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:27,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:27,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:27,698 INFO L87 Difference]: Start difference. First operand 228 states and 568 transitions. Second operand 17 states. [2020-10-11 12:52:28,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:28,082 INFO L93 Difference]: Finished difference Result 304 states and 714 transitions. [2020-10-11 12:52:28,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:52:28,084 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:28,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:28,084 INFO L225 Difference]: With dead ends: 304 [2020-10-11 12:52:28,084 INFO L226 Difference]: Without dead ends: 291 [2020-10-11 12:52:28,085 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:52:28,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-11 12:52:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 226. [2020-10-11 12:52:28,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-11 12:52:28,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 564 transitions. [2020-10-11 12:52:28,088 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 564 transitions. Word has length 14 [2020-10-11 12:52:28,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:28,089 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 564 transitions. [2020-10-11 12:52:28,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:28,089 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 564 transitions. [2020-10-11 12:52:28,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:28,089 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:28,089 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:28,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:28,290 INFO L429 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:28,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:28,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1888203884, now seen corresponding path program 237 times [2020-10-11 12:52:28,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:28,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001232858] [2020-10-11 12:52:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:28,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001232858] [2020-10-11 12:52:28,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767506521] [2020-10-11 12:52:28,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:28,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:52:28,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:28,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:28,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:28,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:28,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:28,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139499910] [2020-10-11 12:52:28,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:28,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:28,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:28,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:28,725 INFO L87 Difference]: Start difference. First operand 226 states and 564 transitions. Second operand 17 states. [2020-10-11 12:52:29,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:29,168 INFO L93 Difference]: Finished difference Result 300 states and 708 transitions. [2020-10-11 12:52:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:52:29,170 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:29,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:29,171 INFO L225 Difference]: With dead ends: 300 [2020-10-11 12:52:29,171 INFO L226 Difference]: Without dead ends: 287 [2020-10-11 12:52:29,171 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:52:29,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-11 12:52:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 224. [2020-10-11 12:52:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-11 12:52:29,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 562 transitions. [2020-10-11 12:52:29,175 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 562 transitions. Word has length 14 [2020-10-11 12:52:29,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:29,175 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 562 transitions. [2020-10-11 12:52:29,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:29,175 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 562 transitions. [2020-10-11 12:52:29,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:29,175 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:29,175 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:29,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2020-10-11 12:52:29,376 INFO L429 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:29,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:29,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1888866974, now seen corresponding path program 238 times [2020-10-11 12:52:29,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:29,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618671293] [2020-10-11 12:52:29,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:29,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618671293] [2020-10-11 12:52:29,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863843763] [2020-10-11 12:52:29,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:29,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:52:29,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:29,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:29,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:29,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:29,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:29,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409394268] [2020-10-11 12:52:29,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:29,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:29,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:29,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:29,816 INFO L87 Difference]: Start difference. First operand 224 states and 562 transitions. Second operand 17 states. [2020-10-11 12:52:30,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:30,322 INFO L93 Difference]: Finished difference Result 294 states and 701 transitions. [2020-10-11 12:52:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:52:30,323 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:30,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:30,324 INFO L225 Difference]: With dead ends: 294 [2020-10-11 12:52:30,324 INFO L226 Difference]: Without dead ends: 281 [2020-10-11 12:52:30,324 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:52:30,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-11 12:52:30,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 224. [2020-10-11 12:52:30,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-11 12:52:30,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 560 transitions. [2020-10-11 12:52:30,328 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 560 transitions. Word has length 14 [2020-10-11 12:52:30,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:30,328 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 560 transitions. [2020-10-11 12:52:30,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:30,328 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 560 transitions. [2020-10-11 12:52:30,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:30,328 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:30,328 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:30,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:30,529 INFO L429 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:30,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:30,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1888889294, now seen corresponding path program 239 times [2020-10-11 12:52:30,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:30,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538267681] [2020-10-11 12:52:30,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:30,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538267681] [2020-10-11 12:52:30,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842175270] [2020-10-11 12:52:30,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:30,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:52:30,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:30,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:30,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:30,944 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:52:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:32,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:32,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-11 12:52:32,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228156943] [2020-10-11 12:52:32,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 12:52:32,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:32,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 12:52:32,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2020-10-11 12:52:32,145 INFO L87 Difference]: Start difference. First operand 224 states and 560 transitions. Second operand 18 states. [2020-10-11 12:52:35,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:35,039 INFO L93 Difference]: Finished difference Result 303 states and 720 transitions. [2020-10-11 12:52:35,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:52:35,040 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-11 12:52:35,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:35,041 INFO L225 Difference]: With dead ends: 303 [2020-10-11 12:52:35,041 INFO L226 Difference]: Without dead ends: 286 [2020-10-11 12:52:35,041 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=307, Invalid=622, Unknown=1, NotChecked=0, Total=930 [2020-10-11 12:52:35,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-11 12:52:35,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 222. [2020-10-11 12:52:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-11 12:52:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 554 transitions. [2020-10-11 12:52:35,045 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 554 transitions. Word has length 14 [2020-10-11 12:52:35,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:35,045 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 554 transitions. [2020-10-11 12:52:35,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 12:52:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 554 transitions. [2020-10-11 12:52:35,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:35,046 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:35,046 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:35,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-10-11 12:52:35,246 INFO L429 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:35,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:35,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1888918124, now seen corresponding path program 240 times [2020-10-11 12:52:35,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:35,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123237899] [2020-10-11 12:52:35,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:35,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123237899] [2020-10-11 12:52:35,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091294994] [2020-10-11 12:52:35,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:35,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:52:35,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:35,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:35,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:35,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:52:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:35,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:35,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:35,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413444172] [2020-10-11 12:52:35,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:35,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:35,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:35,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:35,673 INFO L87 Difference]: Start difference. First operand 222 states and 554 transitions. Second operand 17 states. [2020-10-11 12:52:36,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:36,239 INFO L93 Difference]: Finished difference Result 287 states and 679 transitions. [2020-10-11 12:52:36,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:52:36,241 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:36,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:36,241 INFO L225 Difference]: With dead ends: 287 [2020-10-11 12:52:36,241 INFO L226 Difference]: Without dead ends: 271 [2020-10-11 12:52:36,241 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:52:36,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-11 12:52:36,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 216. [2020-10-11 12:52:36,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-11 12:52:36,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 535 transitions. [2020-10-11 12:52:36,245 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 535 transitions. Word has length 14 [2020-10-11 12:52:36,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:36,246 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 535 transitions. [2020-10-11 12:52:36,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:36,246 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 535 transitions. [2020-10-11 12:52:36,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:52:36,246 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:36,246 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:36,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:36,447 INFO L429 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:36,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:36,447 INFO L82 PathProgramCache]: Analyzing trace with hash 491278210, now seen corresponding path program 241 times [2020-10-11 12:52:36,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:36,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419534670] [2020-10-11 12:52:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:36,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419534670] [2020-10-11 12:52:36,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58560909] [2020-10-11 12:52:36,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:36,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:52:36,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:37,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:37,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:52:37,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021167187] [2020-10-11 12:52:37,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:52:37,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:37,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:52:37,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:52:37,002 INFO L87 Difference]: Start difference. First operand 216 states and 535 transitions. Second operand 19 states. [2020-10-11 12:52:37,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:37,333 INFO L93 Difference]: Finished difference Result 268 states and 633 transitions. [2020-10-11 12:52:37,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:52:37,335 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:52:37,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:37,335 INFO L225 Difference]: With dead ends: 268 [2020-10-11 12:52:37,335 INFO L226 Difference]: Without dead ends: 266 [2020-10-11 12:52:37,335 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:52:37,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-11 12:52:37,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 227. [2020-10-11 12:52:37,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-11 12:52:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 563 transitions. [2020-10-11 12:52:37,339 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 563 transitions. Word has length 15 [2020-10-11 12:52:37,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:37,339 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 563 transitions. [2020-10-11 12:52:37,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:52:37,340 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 563 transitions. [2020-10-11 12:52:37,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:52:37,340 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:37,340 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:37,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-10-11 12:52:37,541 INFO L429 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:37,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:37,541 INFO L82 PathProgramCache]: Analyzing trace with hash 491307040, now seen corresponding path program 242 times [2020-10-11 12:52:37,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:37,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541403433] [2020-10-11 12:52:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:37,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541403433] [2020-10-11 12:52:37,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877473830] [2020-10-11 12:52:37,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:37,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:52:37,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:37,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:52:37,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:38,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:38,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:52:38,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98719854] [2020-10-11 12:52:38,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:52:38,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:38,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:52:38,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:52:38,137 INFO L87 Difference]: Start difference. First operand 227 states and 563 transitions. Second operand 19 states. [2020-10-11 12:52:38,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:38,635 INFO L93 Difference]: Finished difference Result 295 states and 691 transitions. [2020-10-11 12:52:38,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:52:38,636 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:52:38,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:38,637 INFO L225 Difference]: With dead ends: 295 [2020-10-11 12:52:38,637 INFO L226 Difference]: Without dead ends: 292 [2020-10-11 12:52:38,637 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:52:38,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-11 12:52:38,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 229. [2020-10-11 12:52:38,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-11 12:52:38,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 569 transitions. [2020-10-11 12:52:38,640 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 569 transitions. Word has length 15 [2020-10-11 12:52:38,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:38,640 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 569 transitions. [2020-10-11 12:52:38,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:52:38,641 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 569 transitions. [2020-10-11 12:52:38,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:52:38,641 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:38,641 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:38,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2020-10-11 12:52:38,843 INFO L429 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:38,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:38,843 INFO L82 PathProgramCache]: Analyzing trace with hash 492200770, now seen corresponding path program 243 times [2020-10-11 12:52:38,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:38,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753001179] [2020-10-11 12:52:38,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:39,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753001179] [2020-10-11 12:52:39,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369858899] [2020-10-11 12:52:39,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:39,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:52:39,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:39,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:52:39,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:41,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:41,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:52:41,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313834567] [2020-10-11 12:52:41,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:52:41,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:41,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:52:41,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:52:41,768 INFO L87 Difference]: Start difference. First operand 229 states and 569 transitions. Second operand 19 states. [2020-10-11 12:52:42,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:42,346 INFO L93 Difference]: Finished difference Result 294 states and 687 transitions. [2020-10-11 12:52:42,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:52:42,348 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:52:42,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:42,348 INFO L225 Difference]: With dead ends: 294 [2020-10-11 12:52:42,348 INFO L226 Difference]: Without dead ends: 292 [2020-10-11 12:52:42,349 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=244, Invalid=458, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:52:42,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-11 12:52:42,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 231. [2020-10-11 12:52:42,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-11 12:52:42,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 575 transitions. [2020-10-11 12:52:42,352 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 575 transitions. Word has length 15 [2020-10-11 12:52:42,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:42,352 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 575 transitions. [2020-10-11 12:52:42,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:52:42,352 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 575 transitions. [2020-10-11 12:52:42,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:52:42,353 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:42,353 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:42,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:42,554 INFO L429 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:42,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:42,554 INFO L82 PathProgramCache]: Analyzing trace with hash 492201731, now seen corresponding path program 244 times [2020-10-11 12:52:42,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:42,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118577044] [2020-10-11 12:52:42,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:42,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118577044] [2020-10-11 12:52:42,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863484153] [2020-10-11 12:52:42,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:42,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:52:42,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:42,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:52:42,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:45,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:45,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:52:45,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668100142] [2020-10-11 12:52:45,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:52:45,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:45,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:52:45,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=236, Unknown=1, NotChecked=0, Total=342 [2020-10-11 12:52:45,233 INFO L87 Difference]: Start difference. First operand 231 states and 575 transitions. Second operand 19 states. [2020-10-11 12:52:49,515 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-11 12:52:49,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:49,965 INFO L93 Difference]: Finished difference Result 320 states and 746 transitions. [2020-10-11 12:52:49,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:52:49,967 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:52:49,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:49,968 INFO L225 Difference]: With dead ends: 320 [2020-10-11 12:52:49,968 INFO L226 Difference]: Without dead ends: 316 [2020-10-11 12:52:49,968 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=231, Invalid=470, Unknown=1, NotChecked=0, Total=702 [2020-10-11 12:52:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-11 12:52:49,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 232. [2020-10-11 12:52:49,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-11 12:52:49,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 578 transitions. [2020-10-11 12:52:49,972 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 578 transitions. Word has length 15 [2020-10-11 12:52:49,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:49,972 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 578 transitions. [2020-10-11 12:52:49,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:52:49,972 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 578 transitions. [2020-10-11 12:52:49,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:52:49,972 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:49,972 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:50,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:50,173 INFO L429 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:50,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:50,174 INFO L82 PathProgramCache]: Analyzing trace with hash 492230561, now seen corresponding path program 245 times [2020-10-11 12:52:50,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:50,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235255105] [2020-10-11 12:52:50,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:50,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235255105] [2020-10-11 12:52:50,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107596428] [2020-10-11 12:52:50,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:50,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:52:50,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:50,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:52:50,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:50,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:50,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:52:50,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579976818] [2020-10-11 12:52:50,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:52:50,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:50,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:52:50,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:52:50,800 INFO L87 Difference]: Start difference. First operand 232 states and 578 transitions. Second operand 19 states. [2020-10-11 12:52:51,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:51,398 INFO L93 Difference]: Finished difference Result 311 states and 727 transitions. [2020-10-11 12:52:51,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:52:51,399 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:52:51,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:51,400 INFO L225 Difference]: With dead ends: 311 [2020-10-11 12:52:51,400 INFO L226 Difference]: Without dead ends: 308 [2020-10-11 12:52:51,400 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:52:51,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-10-11 12:52:51,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 232. [2020-10-11 12:52:51,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-11 12:52:51,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 578 transitions. [2020-10-11 12:52:51,404 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 578 transitions. Word has length 15 [2020-10-11 12:52:51,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:51,404 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 578 transitions. [2020-10-11 12:52:51,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:52:51,404 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 578 transitions. [2020-10-11 12:52:51,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:52:51,404 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:51,404 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:51,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:51,605 INFO L429 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:51,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:51,606 INFO L82 PathProgramCache]: Analyzing trace with hash 519906400, now seen corresponding path program 246 times [2020-10-11 12:52:51,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:51,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622023568] [2020-10-11 12:52:51,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:51,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622023568] [2020-10-11 12:52:51,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258718042] [2020-10-11 12:52:51,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:51,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:52:51,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:51,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:52:51,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:52,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:52,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:52:52,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54518024] [2020-10-11 12:52:52,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:52:52,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:52,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:52:52,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:52:52,216 INFO L87 Difference]: Start difference. First operand 232 states and 578 transitions. Second operand 19 states. [2020-10-11 12:52:52,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:52,895 INFO L93 Difference]: Finished difference Result 299 states and 700 transitions. [2020-10-11 12:52:52,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:52:52,897 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:52:52,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:52,897 INFO L225 Difference]: With dead ends: 299 [2020-10-11 12:52:52,903 INFO L226 Difference]: Without dead ends: 297 [2020-10-11 12:52:52,903 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:52:52,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-11 12:52:52,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 235. [2020-10-11 12:52:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-11 12:52:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 587 transitions. [2020-10-11 12:52:52,906 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 587 transitions. Word has length 15 [2020-10-11 12:52:52,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:52,906 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 587 transitions. [2020-10-11 12:52:52,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:52:52,907 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 587 transitions. [2020-10-11 12:52:52,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:52:52,907 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:52,907 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:53,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:53,110 INFO L429 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:53,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:53,111 INFO L82 PathProgramCache]: Analyzing trace with hash 519907361, now seen corresponding path program 247 times [2020-10-11 12:52:53,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:53,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134401329] [2020-10-11 12:52:53,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:53,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:53,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134401329] [2020-10-11 12:52:53,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822632323] [2020-10-11 12:52:53,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:53,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:52:53,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:55,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:55,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:52:55,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92962021] [2020-10-11 12:52:55,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:52:55,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:55,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:52:55,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=238, Unknown=1, NotChecked=0, Total=342 [2020-10-11 12:52:55,762 INFO L87 Difference]: Start difference. First operand 235 states and 587 transitions. Second operand 19 states. [2020-10-11 12:52:56,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:56,736 INFO L93 Difference]: Finished difference Result 325 states and 758 transitions. [2020-10-11 12:52:56,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:52:56,737 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:52:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:56,738 INFO L225 Difference]: With dead ends: 325 [2020-10-11 12:52:56,738 INFO L226 Difference]: Without dead ends: 321 [2020-10-11 12:52:56,738 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=248, Invalid=507, Unknown=1, NotChecked=0, Total=756 [2020-10-11 12:52:56,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-11 12:52:56,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 235. [2020-10-11 12:52:56,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-11 12:52:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 587 transitions. [2020-10-11 12:52:56,742 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 587 transitions. Word has length 15 [2020-10-11 12:52:56,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:56,742 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 587 transitions. [2020-10-11 12:52:56,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:52:56,743 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 587 transitions. [2020-10-11 12:52:56,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:52:56,743 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:56,743 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:56,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2020-10-11 12:52:56,944 INFO L429 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:56,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:56,944 INFO L82 PathProgramCache]: Analyzing trace with hash 519936191, now seen corresponding path program 248 times [2020-10-11 12:52:56,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:56,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64141491] [2020-10-11 12:52:56,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:57,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64141491] [2020-10-11 12:52:57,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401972734] [2020-10-11 12:52:57,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:52:57,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:52:57,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:57,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:52:57,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:05,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:05,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:53:05,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191054345] [2020-10-11 12:53:05,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:53:05,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:05,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:53:05,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=233, Unknown=4, NotChecked=0, Total=342 [2020-10-11 12:53:05,855 INFO L87 Difference]: Start difference. First operand 235 states and 587 transitions. Second operand 19 states. [2020-10-11 12:53:10,106 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:53:13,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:13,458 INFO L93 Difference]: Finished difference Result 337 states and 786 transitions. [2020-10-11 12:53:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:53:13,460 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:53:13,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:13,461 INFO L225 Difference]: With dead ends: 337 [2020-10-11 12:53:13,461 INFO L226 Difference]: Without dead ends: 333 [2020-10-11 12:53:13,462 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=253, Invalid=497, Unknown=6, NotChecked=0, Total=756 [2020-10-11 12:53:13,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-11 12:53:13,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 236. [2020-10-11 12:53:13,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-11 12:53:13,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 590 transitions. [2020-10-11 12:53:13,465 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 590 transitions. Word has length 15 [2020-10-11 12:53:13,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:13,466 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 590 transitions. [2020-10-11 12:53:13,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:53:13,466 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 590 transitions. [2020-10-11 12:53:13,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:53:13,466 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:13,466 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:13,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:13,676 INFO L429 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:13,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:13,677 INFO L82 PathProgramCache]: Analyzing trace with hash 520830882, now seen corresponding path program 249 times [2020-10-11 12:53:13,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:13,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294314083] [2020-10-11 12:53:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:13,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294314083] [2020-10-11 12:53:13,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773081748] [2020-10-11 12:53:13,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:53:13,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:53:13,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:13,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:53:13,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:15,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:15,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:53:15,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714811685] [2020-10-11 12:53:15,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:53:15,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:15,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:53:15,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:53:15,082 INFO L87 Difference]: Start difference. First operand 236 states and 590 transitions. Second operand 19 states. [2020-10-11 12:53:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:15,842 INFO L93 Difference]: Finished difference Result 335 states and 781 transitions. [2020-10-11 12:53:15,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:53:15,843 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:53:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:15,844 INFO L225 Difference]: With dead ends: 335 [2020-10-11 12:53:15,844 INFO L226 Difference]: Without dead ends: 319 [2020-10-11 12:53:15,844 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:53:15,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-10-11 12:53:15,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 236. [2020-10-11 12:53:15,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-11 12:53:15,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 583 transitions. [2020-10-11 12:53:15,853 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 583 transitions. Word has length 15 [2020-10-11 12:53:15,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:15,853 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 583 transitions. [2020-10-11 12:53:15,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:53:15,853 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 583 transitions. [2020-10-11 12:53:15,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:53:15,853 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:15,853 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:16,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-10-11 12:53:16,054 INFO L429 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:16,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:16,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1378780930, now seen corresponding path program 250 times [2020-10-11 12:53:16,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:16,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119405667] [2020-10-11 12:53:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:16,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119405667] [2020-10-11 12:53:16,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506168120] [2020-10-11 12:53:16,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:53:16,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:53:16,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:16,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:53:16,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:16,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:16,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:53:16,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621151770] [2020-10-11 12:53:16,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:53:16,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:16,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:53:16,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:53:16,625 INFO L87 Difference]: Start difference. First operand 236 states and 583 transitions. Second operand 19 states. [2020-10-11 12:53:17,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:17,311 INFO L93 Difference]: Finished difference Result 297 states and 694 transitions. [2020-10-11 12:53:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:53:17,313 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:53:17,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:17,313 INFO L225 Difference]: With dead ends: 297 [2020-10-11 12:53:17,313 INFO L226 Difference]: Without dead ends: 295 [2020-10-11 12:53:17,314 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:53:17,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-11 12:53:17,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 240. [2020-10-11 12:53:17,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-11 12:53:17,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 594 transitions. [2020-10-11 12:53:17,318 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 594 transitions. Word has length 15 [2020-10-11 12:53:17,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:17,318 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 594 transitions. [2020-10-11 12:53:17,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:53:17,318 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 594 transitions. [2020-10-11 12:53:17,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:53:17,318 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:17,318 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:17,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:17,519 INFO L429 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:17,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:17,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1378781891, now seen corresponding path program 251 times [2020-10-11 12:53:17,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:17,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029665690] [2020-10-11 12:53:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:17,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029665690] [2020-10-11 12:53:17,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923470930] [2020-10-11 12:53:17,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:53:17,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:53:17,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:17,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:53:17,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:18,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:18,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:53:18,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461077274] [2020-10-11 12:53:18,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:53:18,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:18,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:53:18,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:53:18,095 INFO L87 Difference]: Start difference. First operand 240 states and 594 transitions. Second operand 19 states. [2020-10-11 12:53:18,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:18,780 INFO L93 Difference]: Finished difference Result 321 states and 746 transitions. [2020-10-11 12:53:18,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:53:18,781 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:53:18,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:18,782 INFO L225 Difference]: With dead ends: 321 [2020-10-11 12:53:18,782 INFO L226 Difference]: Without dead ends: 318 [2020-10-11 12:53:18,782 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:53:18,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-11 12:53:18,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 239. [2020-10-11 12:53:18,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-11 12:53:18,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 591 transitions. [2020-10-11 12:53:18,786 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 591 transitions. Word has length 15 [2020-10-11 12:53:18,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:18,786 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 591 transitions. [2020-10-11 12:53:18,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:53:18,786 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 591 transitions. [2020-10-11 12:53:18,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:53:18,787 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:18,787 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:18,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-10-11 12:53:18,988 INFO L429 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:18,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:18,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1378810721, now seen corresponding path program 252 times [2020-10-11 12:53:18,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:18,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203856574] [2020-10-11 12:53:18,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:19,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203856574] [2020-10-11 12:53:19,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980084052] [2020-10-11 12:53:19,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:53:19,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 12:53:19,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:19,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:53:19,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:19,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:19,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:53:19,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084068447] [2020-10-11 12:53:19,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:53:19,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:19,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:53:19,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:53:19,735 INFO L87 Difference]: Start difference. First operand 239 states and 591 transitions. Second operand 19 states. [2020-10-11 12:53:20,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:20,433 INFO L93 Difference]: Finished difference Result 332 states and 772 transitions. [2020-10-11 12:53:20,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:53:20,435 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:53:20,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:20,436 INFO L225 Difference]: With dead ends: 332 [2020-10-11 12:53:20,436 INFO L226 Difference]: Without dead ends: 328 [2020-10-11 12:53:20,436 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:53:20,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-11 12:53:20,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 238. [2020-10-11 12:53:20,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-11 12:53:20,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 588 transitions. [2020-10-11 12:53:20,440 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 588 transitions. Word has length 15 [2020-10-11 12:53:20,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:20,440 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 588 transitions. [2020-10-11 12:53:20,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:53:20,440 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 588 transitions. [2020-10-11 12:53:20,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:53:20,441 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:20,441 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:20,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:20,641 INFO L429 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:20,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:20,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1379704451, now seen corresponding path program 253 times [2020-10-11 12:53:20,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:20,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565355270] [2020-10-11 12:53:20,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:20,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565355270] [2020-10-11 12:53:20,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20425731] [2020-10-11 12:53:20,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:53:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:20,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:53:20,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:21,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:21,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:53:21,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326640235] [2020-10-11 12:53:21,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:53:21,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:21,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:53:21,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:53:21,199 INFO L87 Difference]: Start difference. First operand 238 states and 588 transitions. Second operand 19 states. [2020-10-11 12:53:21,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:21,898 INFO L93 Difference]: Finished difference Result 341 states and 793 transitions. [2020-10-11 12:53:21,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:53:21,899 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:53:21,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:21,900 INFO L225 Difference]: With dead ends: 341 [2020-10-11 12:53:21,900 INFO L226 Difference]: Without dead ends: 337 [2020-10-11 12:53:21,901 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:53:21,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-11 12:53:21,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 243. [2020-10-11 12:53:21,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-11 12:53:21,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 601 transitions. [2020-10-11 12:53:21,904 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 601 transitions. Word has length 15 [2020-10-11 12:53:21,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:21,904 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 601 transitions. [2020-10-11 12:53:21,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:53:21,904 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 601 transitions. [2020-10-11 12:53:21,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:53:21,905 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:21,905 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:22,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:22,106 INFO L429 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:22,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:22,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1379705412, now seen corresponding path program 254 times [2020-10-11 12:53:22,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:22,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878865294] [2020-10-11 12:53:22,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:22,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878865294] [2020-10-11 12:53:22,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763207169] [2020-10-11 12:53:22,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:53:22,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:53:22,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:22,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:53:22,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:22,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:22,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:53:22,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861740432] [2020-10-11 12:53:22,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:53:22,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:22,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:53:22,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:53:22,644 INFO L87 Difference]: Start difference. First operand 243 states and 601 transitions. Second operand 19 states. [2020-10-11 12:53:23,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:23,223 INFO L93 Difference]: Finished difference Result 341 states and 794 transitions. [2020-10-11 12:53:23,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:53:23,224 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:53:23,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:23,225 INFO L225 Difference]: With dead ends: 341 [2020-10-11 12:53:23,225 INFO L226 Difference]: Without dead ends: 326 [2020-10-11 12:53:23,226 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:53:23,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-11 12:53:23,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 244. [2020-10-11 12:53:23,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-11 12:53:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 601 transitions. [2020-10-11 12:53:23,229 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 601 transitions. Word has length 15 [2020-10-11 12:53:23,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:23,229 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 601 transitions. [2020-10-11 12:53:23,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:53:23,230 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 601 transitions. [2020-10-11 12:53:23,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:53:23,230 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:23,230 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:23,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2020-10-11 12:53:23,431 INFO L429 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:23,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:23,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1379734242, now seen corresponding path program 255 times [2020-10-11 12:53:23,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:23,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672657491] [2020-10-11 12:53:23,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:23,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672657491] [2020-10-11 12:53:23,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058833851] [2020-10-11 12:53:23,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:53:23,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:53:23,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:23,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:53:23,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:23,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:23,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:53:23,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384899424] [2020-10-11 12:53:23,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:53:23,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:23,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:53:23,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:53:23,977 INFO L87 Difference]: Start difference. First operand 244 states and 601 transitions. Second operand 19 states. [2020-10-11 12:53:24,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:24,745 INFO L93 Difference]: Finished difference Result 339 states and 790 transitions. [2020-10-11 12:53:24,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:53:24,747 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:53:24,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:24,747 INFO L225 Difference]: With dead ends: 339 [2020-10-11 12:53:24,748 INFO L226 Difference]: Without dead ends: 328 [2020-10-11 12:53:24,748 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:53:24,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-11 12:53:24,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 242. [2020-10-11 12:53:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-11 12:53:24,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 596 transitions. [2020-10-11 12:53:24,752 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 596 transitions. Word has length 15 [2020-10-11 12:53:24,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:24,752 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 596 transitions. [2020-10-11 12:53:24,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:53:24,753 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 596 transitions. [2020-10-11 12:53:24,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:53:24,753 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:24,753 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:24,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:24,955 INFO L429 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:24,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:24,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1407411042, now seen corresponding path program 256 times [2020-10-11 12:53:24,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:24,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759825631] [2020-10-11 12:53:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:25,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759825631] [2020-10-11 12:53:25,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655492169] [2020-10-11 12:53:25,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:53:25,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:53:25,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:25,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:53:25,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:25,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:25,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:53:25,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814798208] [2020-10-11 12:53:25,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:53:25,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:25,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:53:25,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:53:25,581 INFO L87 Difference]: Start difference. First operand 242 states and 596 transitions. Second operand 19 states. [2020-10-11 12:53:26,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:26,563 INFO L93 Difference]: Finished difference Result 344 states and 797 transitions. [2020-10-11 12:53:26,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:53:26,564 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:53:26,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:26,565 INFO L225 Difference]: With dead ends: 344 [2020-10-11 12:53:26,565 INFO L226 Difference]: Without dead ends: 331 [2020-10-11 12:53:26,565 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:53:26,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-11 12:53:26,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 242. [2020-10-11 12:53:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-11 12:53:26,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 594 transitions. [2020-10-11 12:53:26,569 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 594 transitions. Word has length 15 [2020-10-11 12:53:26,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:26,569 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 594 transitions. [2020-10-11 12:53:26,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:53:26,569 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 594 transitions. [2020-10-11 12:53:26,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:53:26,569 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:26,569 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:26,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:26,770 INFO L429 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:26,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:26,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1407439872, now seen corresponding path program 257 times [2020-10-11 12:53:26,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:26,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050880099] [2020-10-11 12:53:26,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:26,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:26,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050880099] [2020-10-11 12:53:26,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346162684] [2020-10-11 12:53:26,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:53:26,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:53:26,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:26,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:53:26,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:33,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:33,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:53:33,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762753042] [2020-10-11 12:53:33,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:53:33,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:33,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:53:33,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-11 12:53:33,275 INFO L87 Difference]: Start difference. First operand 242 states and 594 transitions. Second operand 19 states. [2020-10-11 12:53:37,671 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-11 12:53:41,948 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-11 12:53:44,366 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-11 12:53:44,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:44,702 INFO L93 Difference]: Finished difference Result 327 states and 762 transitions. [2020-10-11 12:53:44,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:53:44,704 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:53:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:44,704 INFO L225 Difference]: With dead ends: 327 [2020-10-11 12:53:44,705 INFO L226 Difference]: Without dead ends: 323 [2020-10-11 12:53:44,705 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-11 12:53:44,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-11 12:53:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 240. [2020-10-11 12:53:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-11 12:53:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 590 transitions. [2020-10-11 12:53:44,708 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 590 transitions. Word has length 15 [2020-10-11 12:53:44,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:44,708 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 590 transitions. [2020-10-11 12:53:44,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:53:44,708 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 590 transitions. [2020-10-11 12:53:44,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:53:44,709 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:44,709 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:44,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:44,910 INFO L429 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:44,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:44,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2060879712, now seen corresponding path program 258 times [2020-10-11 12:53:44,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:44,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075921898] [2020-10-11 12:53:44,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:45,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075921898] [2020-10-11 12:53:45,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063211979] [2020-10-11 12:53:45,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:53:45,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 12:53:45,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:45,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:53:45,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:45,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:45,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:53:45,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147554064] [2020-10-11 12:53:45,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:53:45,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:45,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:53:45,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:53:45,469 INFO L87 Difference]: Start difference. First operand 240 states and 590 transitions. Second operand 19 states. [2020-10-11 12:53:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:46,049 INFO L93 Difference]: Finished difference Result 291 states and 682 transitions. [2020-10-11 12:53:46,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:53:46,050 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:53:46,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:46,051 INFO L225 Difference]: With dead ends: 291 [2020-10-11 12:53:46,051 INFO L226 Difference]: Without dead ends: 289 [2020-10-11 12:53:46,052 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:53:46,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-11 12:53:46,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 246. [2020-10-11 12:53:46,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-11 12:53:46,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 605 transitions. [2020-10-11 12:53:46,055 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 605 transitions. Word has length 15 [2020-10-11 12:53:46,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:46,055 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 605 transitions. [2020-10-11 12:53:46,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:53:46,055 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 605 transitions. [2020-10-11 12:53:46,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:53:46,056 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:46,056 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:46,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:46,257 INFO L429 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:46,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:46,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2060878751, now seen corresponding path program 259 times [2020-10-11 12:53:46,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:46,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370913976] [2020-10-11 12:53:46,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:46,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:46,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370913976] [2020-10-11 12:53:46,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867393238] [2020-10-11 12:53:46,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:53:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:46,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:53:46,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:46,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:46,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:53:46,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770978298] [2020-10-11 12:53:46,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:53:46,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:46,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:53:46,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:53:46,846 INFO L87 Difference]: Start difference. First operand 246 states and 605 transitions. Second operand 19 states. [2020-10-11 12:53:47,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:47,465 INFO L93 Difference]: Finished difference Result 316 states and 735 transitions. [2020-10-11 12:53:47,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:53:47,467 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:53:47,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:47,468 INFO L225 Difference]: With dead ends: 316 [2020-10-11 12:53:47,468 INFO L226 Difference]: Without dead ends: 313 [2020-10-11 12:53:47,469 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:53:47,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-11 12:53:47,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 245. [2020-10-11 12:53:47,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-11 12:53:47,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 602 transitions. [2020-10-11 12:53:47,472 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 602 transitions. Word has length 15 [2020-10-11 12:53:47,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:47,472 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 602 transitions. [2020-10-11 12:53:47,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:53:47,472 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 602 transitions. [2020-10-11 12:53:47,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:53:47,473 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:47,473 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:47,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-10-11 12:53:47,674 INFO L429 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:47,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:47,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2060849921, now seen corresponding path program 260 times [2020-10-11 12:53:47,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:47,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864861761] [2020-10-11 12:53:47,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:47,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864861761] [2020-10-11 12:53:47,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586553153] [2020-10-11 12:53:47,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:53:47,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:53:47,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:47,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:53:47,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:48,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:48,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:53:48,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439691014] [2020-10-11 12:53:48,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:53:48,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:48,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:53:48,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:53:48,425 INFO L87 Difference]: Start difference. First operand 245 states and 602 transitions. Second operand 19 states. [2020-10-11 12:53:49,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:49,108 INFO L93 Difference]: Finished difference Result 330 states and 766 transitions. [2020-10-11 12:53:49,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:53:49,110 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:53:49,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:49,111 INFO L225 Difference]: With dead ends: 330 [2020-10-11 12:53:49,111 INFO L226 Difference]: Without dead ends: 326 [2020-10-11 12:53:49,111 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:53:49,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-11 12:53:49,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 244. [2020-10-11 12:53:49,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-11 12:53:49,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 599 transitions. [2020-10-11 12:53:49,115 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 599 transitions. Word has length 15 [2020-10-11 12:53:49,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:49,115 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 599 transitions. [2020-10-11 12:53:49,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:53:49,115 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 599 transitions. [2020-10-11 12:53:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:53:49,115 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:49,115 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:49,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-10-11 12:53:49,316 INFO L429 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:49,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:49,316 INFO L82 PathProgramCache]: Analyzing trace with hash -2059956191, now seen corresponding path program 261 times [2020-10-11 12:53:49,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:49,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890724388] [2020-10-11 12:53:49,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:49,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:49,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890724388] [2020-10-11 12:53:49,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073309082] [2020-10-11 12:53:49,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:53:49,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:53:49,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:49,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:53:49,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:49,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:49,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:49,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:53:49,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229646806] [2020-10-11 12:53:49,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:53:49,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:49,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:53:49,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:53:49,961 INFO L87 Difference]: Start difference. First operand 244 states and 599 transitions. Second operand 19 states. [2020-10-11 12:53:50,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:50,802 INFO L93 Difference]: Finished difference Result 328 states and 761 transitions. [2020-10-11 12:53:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:53:50,804 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:53:50,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:50,805 INFO L225 Difference]: With dead ends: 328 [2020-10-11 12:53:50,805 INFO L226 Difference]: Without dead ends: 324 [2020-10-11 12:53:50,806 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:53:50,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-11 12:53:50,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 251. [2020-10-11 12:53:50,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-11 12:53:50,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 616 transitions. [2020-10-11 12:53:50,809 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 616 transitions. Word has length 15 [2020-10-11 12:53:50,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:50,809 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 616 transitions. [2020-10-11 12:53:50,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:53:50,809 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 616 transitions. [2020-10-11 12:53:50,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:53:50,810 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:50,810 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:51,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-10-11 12:53:51,010 INFO L429 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:51,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:51,011 INFO L82 PathProgramCache]: Analyzing trace with hash -2059955230, now seen corresponding path program 262 times [2020-10-11 12:53:51,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:51,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015523586] [2020-10-11 12:53:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:51,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015523586] [2020-10-11 12:53:51,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229175308] [2020-10-11 12:53:51,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:51,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:53:51,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:51,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:53:51,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:59,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:59,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:53:59,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301006964] [2020-10-11 12:53:59,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:53:59,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:59,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:53:59,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-11 12:53:59,023 INFO L87 Difference]: Start difference. First operand 251 states and 616 transitions. Second operand 19 states. [2020-10-11 12:54:03,515 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-11 12:54:07,700 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-11 12:54:09,975 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-11 12:54:10,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:10,404 INFO L93 Difference]: Finished difference Result 348 states and 801 transitions. [2020-10-11 12:54:10,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:54:10,406 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:54:10,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:10,407 INFO L225 Difference]: With dead ends: 348 [2020-10-11 12:54:10,407 INFO L226 Difference]: Without dead ends: 332 [2020-10-11 12:54:10,407 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-11 12:54:10,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-11 12:54:10,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 254. [2020-10-11 12:54:10,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-11 12:54:10,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 619 transitions. [2020-10-11 12:54:10,411 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 619 transitions. Word has length 15 [2020-10-11 12:54:10,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:10,411 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 619 transitions. [2020-10-11 12:54:10,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:54:10,411 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 619 transitions. [2020-10-11 12:54:10,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:54:10,411 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:10,411 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:10,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:10,612 INFO L429 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:10,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:10,613 INFO L82 PathProgramCache]: Analyzing trace with hash -2059926400, now seen corresponding path program 263 times [2020-10-11 12:54:10,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:10,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609994411] [2020-10-11 12:54:10,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:10,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609994411] [2020-10-11 12:54:10,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023789009] [2020-10-11 12:54:10,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:10,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 12:54:10,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:10,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:54:10,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:11,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:11,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:54:11,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116728816] [2020-10-11 12:54:11,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:54:11,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:11,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:54:11,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:54:11,305 INFO L87 Difference]: Start difference. First operand 254 states and 619 transitions. Second operand 19 states. [2020-10-11 12:54:12,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:12,333 INFO L93 Difference]: Finished difference Result 342 states and 787 transitions. [2020-10-11 12:54:12,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:54:12,335 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:54:12,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:12,335 INFO L225 Difference]: With dead ends: 342 [2020-10-11 12:54:12,335 INFO L226 Difference]: Without dead ends: 331 [2020-10-11 12:54:12,336 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:54:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-11 12:54:12,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 250. [2020-10-11 12:54:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-11 12:54:12,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 611 transitions. [2020-10-11 12:54:12,339 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 611 transitions. Word has length 15 [2020-10-11 12:54:12,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:12,339 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 611 transitions. [2020-10-11 12:54:12,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:54:12,340 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 611 transitions. [2020-10-11 12:54:12,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:54:12,340 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:12,340 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:12,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2020-10-11 12:54:12,541 INFO L429 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:12,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:12,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2032250561, now seen corresponding path program 264 times [2020-10-11 12:54:12,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:12,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54387904] [2020-10-11 12:54:12,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:12,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54387904] [2020-10-11 12:54:12,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806451006] [2020-10-11 12:54:12,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:12,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 12:54:12,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:12,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:54:12,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:13,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:13,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:54:13,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566465239] [2020-10-11 12:54:13,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:54:13,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:13,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:54:13,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:54:13,118 INFO L87 Difference]: Start difference. First operand 250 states and 611 transitions. Second operand 19 states. [2020-10-11 12:54:13,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:13,840 INFO L93 Difference]: Finished difference Result 326 states and 755 transitions. [2020-10-11 12:54:13,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:54:13,842 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:54:13,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:13,843 INFO L225 Difference]: With dead ends: 326 [2020-10-11 12:54:13,843 INFO L226 Difference]: Without dead ends: 322 [2020-10-11 12:54:13,843 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:54:13,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-11 12:54:13,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 255. [2020-10-11 12:54:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-11 12:54:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 623 transitions. [2020-10-11 12:54:13,847 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 623 transitions. Word has length 15 [2020-10-11 12:54:13,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:13,847 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 623 transitions. [2020-10-11 12:54:13,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:54:13,847 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 623 transitions. [2020-10-11 12:54:13,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:54:13,847 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:13,847 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:14,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2020-10-11 12:54:14,048 INFO L429 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:14,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:14,049 INFO L82 PathProgramCache]: Analyzing trace with hash -2032220770, now seen corresponding path program 265 times [2020-10-11 12:54:14,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:14,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782750220] [2020-10-11 12:54:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:14,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782750220] [2020-10-11 12:54:14,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761807227] [2020-10-11 12:54:14,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:14,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:54:14,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:14,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:14,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:54:14,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092123062] [2020-10-11 12:54:14,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:54:14,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:14,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:54:14,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:54:14,605 INFO L87 Difference]: Start difference. First operand 255 states and 623 transitions. Second operand 19 states. [2020-10-11 12:54:15,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:15,269 INFO L93 Difference]: Finished difference Result 341 states and 782 transitions. [2020-10-11 12:54:15,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:54:15,272 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:54:15,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:15,272 INFO L225 Difference]: With dead ends: 341 [2020-10-11 12:54:15,273 INFO L226 Difference]: Without dead ends: 330 [2020-10-11 12:54:15,273 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:54:15,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-11 12:54:15,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 251. [2020-10-11 12:54:15,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-11 12:54:15,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 615 transitions. [2020-10-11 12:54:15,276 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 615 transitions. Word has length 15 [2020-10-11 12:54:15,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:15,276 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 615 transitions. [2020-10-11 12:54:15,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:54:15,276 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 615 transitions. [2020-10-11 12:54:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:54:15,276 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:15,277 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:15,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:15,477 INFO L429 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:15,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:15,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1173375070, now seen corresponding path program 266 times [2020-10-11 12:54:15,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:15,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617865628] [2020-10-11 12:54:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:15,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617865628] [2020-10-11 12:54:15,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593859545] [2020-10-11 12:54:15,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:15,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:54:15,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:15,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:54:15,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:16,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:16,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:54:16,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828882276] [2020-10-11 12:54:16,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:54:16,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:16,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:54:16,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:54:16,214 INFO L87 Difference]: Start difference. First operand 251 states and 615 transitions. Second operand 19 states. [2020-10-11 12:54:17,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:17,003 INFO L93 Difference]: Finished difference Result 325 states and 750 transitions. [2020-10-11 12:54:17,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:54:17,005 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:54:17,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:17,006 INFO L225 Difference]: With dead ends: 325 [2020-10-11 12:54:17,006 INFO L226 Difference]: Without dead ends: 313 [2020-10-11 12:54:17,007 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:54:17,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-11 12:54:17,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 249. [2020-10-11 12:54:17,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-11 12:54:17,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 610 transitions. [2020-10-11 12:54:17,010 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 610 transitions. Word has length 15 [2020-10-11 12:54:17,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:17,010 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 610 transitions. [2020-10-11 12:54:17,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:54:17,010 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 610 transitions. [2020-10-11 12:54:17,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:54:17,011 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:17,011 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:17,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:17,212 INFO L429 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:17,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:17,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1173345279, now seen corresponding path program 267 times [2020-10-11 12:54:17,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:17,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879289808] [2020-10-11 12:54:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:17,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879289808] [2020-10-11 12:54:17,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042030459] [2020-10-11 12:54:17,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:17,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:54:17,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:17,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:54:17,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:18,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:18,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:54:18,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021628103] [2020-10-11 12:54:18,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:54:18,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:18,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:54:18,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:54:18,040 INFO L87 Difference]: Start difference. First operand 249 states and 610 transitions. Second operand 19 states. [2020-10-11 12:54:19,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:19,038 INFO L93 Difference]: Finished difference Result 320 states and 735 transitions. [2020-10-11 12:54:19,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:54:19,040 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:54:19,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:19,040 INFO L225 Difference]: With dead ends: 320 [2020-10-11 12:54:19,040 INFO L226 Difference]: Without dead ends: 307 [2020-10-11 12:54:19,041 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=291, Invalid=579, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:54:19,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-11 12:54:19,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 246. [2020-10-11 12:54:19,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-11 12:54:19,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 602 transitions. [2020-10-11 12:54:19,044 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 602 transitions. Word has length 15 [2020-10-11 12:54:19,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:19,044 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 602 transitions. [2020-10-11 12:54:19,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:54:19,045 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 602 transitions. [2020-10-11 12:54:19,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:54:19,045 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:19,045 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:19,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:19,245 INFO L429 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:19,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:19,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1143823359, now seen corresponding path program 268 times [2020-10-11 12:54:19,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:19,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034575317] [2020-10-11 12:54:19,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:19,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034575317] [2020-10-11 12:54:19,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298011377] [2020-10-11 12:54:19,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:19,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:54:19,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:19,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:54:19,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:19,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:19,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:54:19,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923825344] [2020-10-11 12:54:19,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:54:19,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:19,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:54:19,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:54:19,948 INFO L87 Difference]: Start difference. First operand 246 states and 602 transitions. Second operand 19 states. [2020-10-11 12:54:20,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:20,297 INFO L93 Difference]: Finished difference Result 300 states and 697 transitions. [2020-10-11 12:54:20,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:54:20,299 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:54:20,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:20,299 INFO L225 Difference]: With dead ends: 300 [2020-10-11 12:54:20,299 INFO L226 Difference]: Without dead ends: 289 [2020-10-11 12:54:20,299 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:54:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-11 12:54:20,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 248. [2020-10-11 12:54:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-11 12:54:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 604 transitions. [2020-10-11 12:54:20,303 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 604 transitions. Word has length 15 [2020-10-11 12:54:20,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:20,303 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 604 transitions. [2020-10-11 12:54:20,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:54:20,303 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 604 transitions. [2020-10-11 12:54:20,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:54:20,304 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:20,304 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:20,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2020-10-11 12:54:20,504 INFO L429 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:20,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:20,505 INFO L82 PathProgramCache]: Analyzing trace with hash 439566480, now seen corresponding path program 269 times [2020-10-11 12:54:20,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:20,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163573411] [2020-10-11 12:54:20,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:20,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163573411] [2020-10-11 12:54:20,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033669633] [2020-10-11 12:54:20,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:20,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:54:20,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:20,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:54:20,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:21,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:21,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:54:21,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647409238] [2020-10-11 12:54:21,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:54:21,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:21,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:54:21,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:54:21,222 INFO L87 Difference]: Start difference. First operand 248 states and 604 transitions. Second operand 19 states. [2020-10-11 12:54:21,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:21,665 INFO L93 Difference]: Finished difference Result 308 states and 716 transitions. [2020-10-11 12:54:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:54:21,667 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:54:21,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:21,668 INFO L225 Difference]: With dead ends: 308 [2020-10-11 12:54:21,668 INFO L226 Difference]: Without dead ends: 306 [2020-10-11 12:54:21,668 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:54:21,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-11 12:54:21,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 254. [2020-10-11 12:54:21,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-11 12:54:21,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 622 transitions. [2020-10-11 12:54:21,673 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 622 transitions. Word has length 15 [2020-10-11 12:54:21,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:21,673 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 622 transitions. [2020-10-11 12:54:21,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:54:21,673 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 622 transitions. [2020-10-11 12:54:21,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:54:21,673 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:21,673 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:21,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:21,874 INFO L429 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:21,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:21,874 INFO L82 PathProgramCache]: Analyzing trace with hash 439595310, now seen corresponding path program 270 times [2020-10-11 12:54:21,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:21,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420541642] [2020-10-11 12:54:21,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:22,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420541642] [2020-10-11 12:54:22,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039999685] [2020-10-11 12:54:22,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:22,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:54:22,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:22,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:54:22,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:22,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:22,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:54:22,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428235601] [2020-10-11 12:54:22,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:54:22,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:22,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:54:22,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:54:22,643 INFO L87 Difference]: Start difference. First operand 254 states and 622 transitions. Second operand 19 states. [2020-10-11 12:54:23,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:23,310 INFO L93 Difference]: Finished difference Result 335 states and 780 transitions. [2020-10-11 12:54:23,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:54:23,312 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:54:23,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:23,313 INFO L225 Difference]: With dead ends: 335 [2020-10-11 12:54:23,313 INFO L226 Difference]: Without dead ends: 332 [2020-10-11 12:54:23,313 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:54:23,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-11 12:54:23,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 252. [2020-10-11 12:54:23,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-11 12:54:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 616 transitions. [2020-10-11 12:54:23,316 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 616 transitions. Word has length 15 [2020-10-11 12:54:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:23,317 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 616 transitions. [2020-10-11 12:54:23,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:54:23,317 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 616 transitions. [2020-10-11 12:54:23,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:54:23,317 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:23,317 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:23,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2020-10-11 12:54:23,518 INFO L429 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:23,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:23,518 INFO L82 PathProgramCache]: Analyzing trace with hash 440489040, now seen corresponding path program 271 times [2020-10-11 12:54:23,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:23,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643278457] [2020-10-11 12:54:23,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:23,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643278457] [2020-10-11 12:54:23,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991262595] [2020-10-11 12:54:23,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:23,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:54:23,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:28,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:28,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:54:28,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523709713] [2020-10-11 12:54:28,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:54:28,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:28,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:54:28,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:54:28,403 INFO L87 Difference]: Start difference. First operand 252 states and 616 transitions. Second operand 19 states. [2020-10-11 12:54:29,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:29,242 INFO L93 Difference]: Finished difference Result 329 states and 762 transitions. [2020-10-11 12:54:29,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:54:29,244 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:54:29,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:29,245 INFO L225 Difference]: With dead ends: 329 [2020-10-11 12:54:29,245 INFO L226 Difference]: Without dead ends: 327 [2020-10-11 12:54:29,245 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:54:29,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-11 12:54:29,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 254. [2020-10-11 12:54:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-11 12:54:29,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 622 transitions. [2020-10-11 12:54:29,249 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 622 transitions. Word has length 15 [2020-10-11 12:54:29,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:29,249 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 622 transitions. [2020-10-11 12:54:29,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:54:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 622 transitions. [2020-10-11 12:54:29,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:54:29,250 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:29,250 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:29,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-10-11 12:54:29,450 INFO L429 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:29,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:29,451 INFO L82 PathProgramCache]: Analyzing trace with hash 440490001, now seen corresponding path program 272 times [2020-10-11 12:54:29,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:29,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025683311] [2020-10-11 12:54:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:29,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025683311] [2020-10-11 12:54:29,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196458026] [2020-10-11 12:54:29,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:29,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:54:29,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:29,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:54:29,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:33,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:33,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:54:33,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722101930] [2020-10-11 12:54:33,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:54:33,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:33,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:54:33,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=251, Unknown=1, NotChecked=0, Total=342 [2020-10-11 12:54:33,704 INFO L87 Difference]: Start difference. First operand 254 states and 622 transitions. Second operand 19 states. [2020-10-11 12:54:38,037 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-11 12:54:38,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:38,702 INFO L93 Difference]: Finished difference Result 362 states and 839 transitions. [2020-10-11 12:54:38,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:54:38,704 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:54:38,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:38,704 INFO L225 Difference]: With dead ends: 362 [2020-10-11 12:54:38,705 INFO L226 Difference]: Without dead ends: 358 [2020-10-11 12:54:38,705 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=256, Invalid=555, Unknown=1, NotChecked=0, Total=812 [2020-10-11 12:54:38,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-11 12:54:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 254. [2020-10-11 12:54:38,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-11 12:54:38,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 622 transitions. [2020-10-11 12:54:38,708 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 622 transitions. Word has length 15 [2020-10-11 12:54:38,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:38,709 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 622 transitions. [2020-10-11 12:54:38,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:54:38,709 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 622 transitions. [2020-10-11 12:54:38,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:54:38,709 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:38,709 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:38,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-10-11 12:54:38,910 INFO L429 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:38,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:38,910 INFO L82 PathProgramCache]: Analyzing trace with hash 440518831, now seen corresponding path program 273 times [2020-10-11 12:54:38,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:38,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631783213] [2020-10-11 12:54:38,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:39,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631783213] [2020-10-11 12:54:39,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222537504] [2020-10-11 12:54:39,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:39,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:54:39,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:39,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:54:39,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:39,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:39,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:54:39,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933401278] [2020-10-11 12:54:39,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:54:39,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:39,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:54:39,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:54:39,688 INFO L87 Difference]: Start difference. First operand 254 states and 622 transitions. Second operand 19 states. [2020-10-11 12:54:40,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:40,578 INFO L93 Difference]: Finished difference Result 348 states and 807 transitions. [2020-10-11 12:54:40,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:54:40,580 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:54:40,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:40,581 INFO L225 Difference]: With dead ends: 348 [2020-10-11 12:54:40,581 INFO L226 Difference]: Without dead ends: 345 [2020-10-11 12:54:40,581 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:54:40,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-11 12:54:40,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 250. [2020-10-11 12:54:40,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-11 12:54:40,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 610 transitions. [2020-10-11 12:54:40,585 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 610 transitions. Word has length 15 [2020-10-11 12:54:40,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:40,585 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 610 transitions. [2020-10-11 12:54:40,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:54:40,585 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 610 transitions. [2020-10-11 12:54:40,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:54:40,586 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:40,586 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:40,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-10-11 12:54:40,786 INFO L429 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:40,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:40,787 INFO L82 PathProgramCache]: Analyzing trace with hash 468194670, now seen corresponding path program 274 times [2020-10-11 12:54:40,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:40,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45071839] [2020-10-11 12:54:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:41,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45071839] [2020-10-11 12:54:41,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135128869] [2020-10-11 12:54:41,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:41,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:54:41,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:41,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:54:41,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:41,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:41,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:54:41,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681702601] [2020-10-11 12:54:41,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:54:41,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:41,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:54:41,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:54:41,533 INFO L87 Difference]: Start difference. First operand 250 states and 610 transitions. Second operand 19 states. [2020-10-11 12:54:42,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:42,618 INFO L93 Difference]: Finished difference Result 322 states and 743 transitions. [2020-10-11 12:54:42,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:54:42,621 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:54:42,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:42,621 INFO L225 Difference]: With dead ends: 322 [2020-10-11 12:54:42,621 INFO L226 Difference]: Without dead ends: 320 [2020-10-11 12:54:42,622 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=312, Invalid=680, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:54:42,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-11 12:54:42,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 253. [2020-10-11 12:54:42,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-11 12:54:42,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 619 transitions. [2020-10-11 12:54:42,625 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 619 transitions. Word has length 15 [2020-10-11 12:54:42,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:42,625 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 619 transitions. [2020-10-11 12:54:42,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:54:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 619 transitions. [2020-10-11 12:54:42,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:54:42,625 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:42,625 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:42,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2020-10-11 12:54:42,826 INFO L429 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:42,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:42,827 INFO L82 PathProgramCache]: Analyzing trace with hash 468195631, now seen corresponding path program 275 times [2020-10-11 12:54:42,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:42,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143539369] [2020-10-11 12:54:42,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:43,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143539369] [2020-10-11 12:54:43,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463633421] [2020-10-11 12:54:43,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:43,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:54:43,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:43,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:54:43,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:43,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:43,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:54:43,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107838616] [2020-10-11 12:54:43,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:54:43,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:43,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:54:43,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:54:43,564 INFO L87 Difference]: Start difference. First operand 253 states and 619 transitions. Second operand 19 states. [2020-10-11 12:54:44,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:44,628 INFO L93 Difference]: Finished difference Result 356 states and 822 transitions. [2020-10-11 12:54:44,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:54:44,631 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:54:44,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:44,631 INFO L225 Difference]: With dead ends: 356 [2020-10-11 12:54:44,632 INFO L226 Difference]: Without dead ends: 352 [2020-10-11 12:54:44,632 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:54:44,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-11 12:54:44,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 253. [2020-10-11 12:54:44,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-11 12:54:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 619 transitions. [2020-10-11 12:54:44,635 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 619 transitions. Word has length 15 [2020-10-11 12:54:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:44,635 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 619 transitions. [2020-10-11 12:54:44,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:54:44,635 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 619 transitions. [2020-10-11 12:54:44,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:54:44,636 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:44,636 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:44,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-10-11 12:54:44,836 INFO L429 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:44,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:44,837 INFO L82 PathProgramCache]: Analyzing trace with hash 468224461, now seen corresponding path program 276 times [2020-10-11 12:54:44,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:44,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611773351] [2020-10-11 12:54:44,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:45,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611773351] [2020-10-11 12:54:45,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319919185] [2020-10-11 12:54:45,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:45,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:54:45,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:45,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:54:45,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:52,080 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-11 12:54:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:57,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:57,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:54:57,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269553412] [2020-10-11 12:54:57,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:54:57,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:57,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:54:57,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=251, Unknown=2, NotChecked=0, Total=342 [2020-10-11 12:54:57,782 INFO L87 Difference]: Start difference. First operand 253 states and 619 transitions. Second operand 19 states. [2020-10-11 12:55:02,127 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:55:15,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:15,933 INFO L93 Difference]: Finished difference Result 372 states and 857 transitions. [2020-10-11 12:55:15,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:55:15,935 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:15,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:15,936 INFO L225 Difference]: With dead ends: 372 [2020-10-11 12:55:15,936 INFO L226 Difference]: Without dead ends: 368 [2020-10-11 12:55:15,936 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=278, Invalid=587, Unknown=5, NotChecked=0, Total=870 [2020-10-11 12:55:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-10-11 12:55:15,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 254. [2020-10-11 12:55:15,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-11 12:55:15,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 622 transitions. [2020-10-11 12:55:15,939 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 622 transitions. Word has length 15 [2020-10-11 12:55:15,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:15,939 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 622 transitions. [2020-10-11 12:55:15,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:15,939 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 622 transitions. [2020-10-11 12:55:15,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:15,940 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:15,940 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:16,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2020-10-11 12:55:16,148 INFO L429 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:16,148 INFO L82 PathProgramCache]: Analyzing trace with hash 469119152, now seen corresponding path program 277 times [2020-10-11 12:55:16,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:16,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408827485] [2020-10-11 12:55:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:16,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408827485] [2020-10-11 12:55:16,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145849207] [2020-10-11 12:55:16,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:16,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:16,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:17,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:17,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:17,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314700343] [2020-10-11 12:55:17,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:17,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:17,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:17,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:55:17,762 INFO L87 Difference]: Start difference. First operand 254 states and 622 transitions. Second operand 19 states. [2020-10-11 12:55:18,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:18,983 INFO L93 Difference]: Finished difference Result 370 states and 850 transitions. [2020-10-11 12:55:18,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:55:18,985 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:18,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:18,986 INFO L225 Difference]: With dead ends: 370 [2020-10-11 12:55:18,986 INFO L226 Difference]: Without dead ends: 354 [2020-10-11 12:55:18,986 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=310, Invalid=682, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:55:18,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-11 12:55:18,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 248. [2020-10-11 12:55:18,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-11 12:55:18,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 604 transitions. [2020-10-11 12:55:18,990 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 604 transitions. Word has length 15 [2020-10-11 12:55:18,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:18,990 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 604 transitions. [2020-10-11 12:55:18,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:18,990 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 604 transitions. [2020-10-11 12:55:18,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:18,991 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:18,991 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:19,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:19,191 INFO L429 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:19,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:19,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1327069200, now seen corresponding path program 278 times [2020-10-11 12:55:19,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:19,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766632689] [2020-10-11 12:55:19,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:19,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766632689] [2020-10-11 12:55:19,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600225666] [2020-10-11 12:55:19,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:19,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:55:19,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:55:19,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:19,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:19,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:19,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:19,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316133296] [2020-10-11 12:55:19,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:19,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:19,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:19,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:55:19,847 INFO L87 Difference]: Start difference. First operand 248 states and 604 transitions. Second operand 19 states. [2020-10-11 12:55:20,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:20,867 INFO L93 Difference]: Finished difference Result 311 states and 720 transitions. [2020-10-11 12:55:20,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:55:20,869 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:20,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:20,869 INFO L225 Difference]: With dead ends: 311 [2020-10-11 12:55:20,869 INFO L226 Difference]: Without dead ends: 309 [2020-10-11 12:55:20,870 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=361, Invalid=829, Unknown=0, NotChecked=0, Total=1190 [2020-10-11 12:55:20,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-11 12:55:20,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 252. [2020-10-11 12:55:20,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-11 12:55:20,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 615 transitions. [2020-10-11 12:55:20,874 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 615 transitions. Word has length 15 [2020-10-11 12:55:20,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:20,874 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 615 transitions. [2020-10-11 12:55:20,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:20,875 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 615 transitions. [2020-10-11 12:55:20,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:20,875 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:20,875 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:21,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2020-10-11 12:55:21,085 INFO L429 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:21,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:21,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1327070161, now seen corresponding path program 279 times [2020-10-11 12:55:21,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:21,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423365657] [2020-10-11 12:55:21,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:21,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423365657] [2020-10-11 12:55:21,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440431500] [2020-10-11 12:55:21,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:21,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:55:21,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:55:21,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:21,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:21,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:21,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:21,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753577216] [2020-10-11 12:55:21,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:21,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:21,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:21,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:55:21,739 INFO L87 Difference]: Start difference. First operand 252 states and 615 transitions. Second operand 19 states. [2020-10-11 12:55:22,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:22,812 INFO L93 Difference]: Finished difference Result 338 states and 777 transitions. [2020-10-11 12:55:22,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:55:22,815 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:22,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:22,815 INFO L225 Difference]: With dead ends: 338 [2020-10-11 12:55:22,816 INFO L226 Difference]: Without dead ends: 335 [2020-10-11 12:55:22,816 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=333, Invalid=789, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:55:22,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-11 12:55:22,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 251. [2020-10-11 12:55:22,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-11 12:55:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 612 transitions. [2020-10-11 12:55:22,819 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 612 transitions. Word has length 15 [2020-10-11 12:55:22,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:22,820 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 612 transitions. [2020-10-11 12:55:22,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:22,820 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 612 transitions. [2020-10-11 12:55:22,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:22,820 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:22,820 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:23,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:23,025 INFO L429 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:23,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:23,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1327098991, now seen corresponding path program 280 times [2020-10-11 12:55:23,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:23,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129108198] [2020-10-11 12:55:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:23,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129108198] [2020-10-11 12:55:23,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485816512] [2020-10-11 12:55:23,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:23,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:55:23,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:55:23,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:23,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:25,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:25,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:25,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31203338] [2020-10-11 12:55:25,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:25,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:25,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:25,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:55:25,308 INFO L87 Difference]: Start difference. First operand 251 states and 612 transitions. Second operand 19 states. [2020-10-11 12:55:26,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:26,356 INFO L93 Difference]: Finished difference Result 345 states and 795 transitions. [2020-10-11 12:55:26,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:55:26,358 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:26,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:26,359 INFO L225 Difference]: With dead ends: 345 [2020-10-11 12:55:26,359 INFO L226 Difference]: Without dead ends: 341 [2020-10-11 12:55:26,359 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=327, Invalid=729, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:55:26,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-11 12:55:26,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 250. [2020-10-11 12:55:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-11 12:55:26,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 609 transitions. [2020-10-11 12:55:26,363 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 609 transitions. Word has length 15 [2020-10-11 12:55:26,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:26,363 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 609 transitions. [2020-10-11 12:55:26,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:26,363 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 609 transitions. [2020-10-11 12:55:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:26,364 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:26,364 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:26,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:26,565 INFO L429 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:26,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:26,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1327992721, now seen corresponding path program 281 times [2020-10-11 12:55:26,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:26,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991026747] [2020-10-11 12:55:26,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:26,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991026747] [2020-10-11 12:55:26,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311897925] [2020-10-11 12:55:26,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:26,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:55:26,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:55:26,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:26,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:27,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:27,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:27,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116532631] [2020-10-11 12:55:27,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:27,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:27,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:27,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:55:27,208 INFO L87 Difference]: Start difference. First operand 250 states and 609 transitions. Second operand 19 states. [2020-10-11 12:55:28,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:28,241 INFO L93 Difference]: Finished difference Result 354 states and 811 transitions. [2020-10-11 12:55:28,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:55:28,243 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:28,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:28,244 INFO L225 Difference]: With dead ends: 354 [2020-10-11 12:55:28,244 INFO L226 Difference]: Without dead ends: 350 [2020-10-11 12:55:28,245 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:55:28,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-11 12:55:28,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 255. [2020-10-11 12:55:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-11 12:55:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 622 transitions. [2020-10-11 12:55:28,249 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 622 transitions. Word has length 15 [2020-10-11 12:55:28,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:28,249 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 622 transitions. [2020-10-11 12:55:28,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:28,249 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 622 transitions. [2020-10-11 12:55:28,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:28,250 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:28,250 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:28,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:28,459 INFO L429 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:28,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:28,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1327993682, now seen corresponding path program 282 times [2020-10-11 12:55:28,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:28,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700445513] [2020-10-11 12:55:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:28,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700445513] [2020-10-11 12:55:28,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742280944] [2020-10-11 12:55:28,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:28,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:55:28,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:55:28,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:28,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:29,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:29,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:29,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118977992] [2020-10-11 12:55:29,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:29,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:29,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:29,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:55:29,078 INFO L87 Difference]: Start difference. First operand 255 states and 622 transitions. Second operand 19 states. [2020-10-11 12:55:29,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:29,883 INFO L93 Difference]: Finished difference Result 356 states and 815 transitions. [2020-10-11 12:55:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 12:55:29,885 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:29,886 INFO L225 Difference]: With dead ends: 356 [2020-10-11 12:55:29,886 INFO L226 Difference]: Without dead ends: 341 [2020-10-11 12:55:29,886 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=283, Invalid=647, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:55:29,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-11 12:55:29,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 256. [2020-10-11 12:55:29,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-11 12:55:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 622 transitions. [2020-10-11 12:55:29,889 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 622 transitions. Word has length 15 [2020-10-11 12:55:29,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:29,889 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 622 transitions. [2020-10-11 12:55:29,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 622 transitions. [2020-10-11 12:55:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:29,890 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:29,890 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:30,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-10-11 12:55:30,090 INFO L429 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:30,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:30,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1328022512, now seen corresponding path program 283 times [2020-10-11 12:55:30,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:30,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126080565] [2020-10-11 12:55:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:30,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126080565] [2020-10-11 12:55:30,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615506701] [2020-10-11 12:55:30,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:30,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:30,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:30,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:30,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:30,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957569481] [2020-10-11 12:55:30,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:30,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:30,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:30,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:55:30,731 INFO L87 Difference]: Start difference. First operand 256 states and 622 transitions. Second operand 19 states. [2020-10-11 12:55:31,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:31,831 INFO L93 Difference]: Finished difference Result 348 states and 796 transitions. [2020-10-11 12:55:31,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 12:55:31,833 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:31,834 INFO L225 Difference]: With dead ends: 348 [2020-10-11 12:55:31,834 INFO L226 Difference]: Without dead ends: 337 [2020-10-11 12:55:31,834 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=366, Invalid=824, Unknown=0, NotChecked=0, Total=1190 [2020-10-11 12:55:31,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-11 12:55:31,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 252. [2020-10-11 12:55:31,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-11 12:55:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 614 transitions. [2020-10-11 12:55:31,838 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 614 transitions. Word has length 15 [2020-10-11 12:55:31,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:31,838 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 614 transitions. [2020-10-11 12:55:31,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:31,838 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 614 transitions. [2020-10-11 12:55:31,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:31,838 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:31,838 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:32,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-10-11 12:55:32,039 INFO L429 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:32,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1355699312, now seen corresponding path program 284 times [2020-10-11 12:55:32,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:32,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527783812] [2020-10-11 12:55:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:32,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:32,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527783812] [2020-10-11 12:55:32,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480295780] [2020-10-11 12:55:32,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:32,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:55:32,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:55:32,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:32,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:33,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:33,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:33,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765268244] [2020-10-11 12:55:33,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:33,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:33,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:33,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:55:33,646 INFO L87 Difference]: Start difference. First operand 252 states and 614 transitions. Second operand 19 states. [2020-10-11 12:55:35,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:35,124 INFO L93 Difference]: Finished difference Result 344 states and 788 transitions. [2020-10-11 12:55:35,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:55:35,126 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:35,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:35,127 INFO L225 Difference]: With dead ends: 344 [2020-10-11 12:55:35,127 INFO L226 Difference]: Without dead ends: 331 [2020-10-11 12:55:35,127 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=378, Invalid=882, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 12:55:35,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-11 12:55:35,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 252. [2020-10-11 12:55:35,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-11 12:55:35,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 612 transitions. [2020-10-11 12:55:35,130 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 612 transitions. Word has length 15 [2020-10-11 12:55:35,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:35,130 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 612 transitions. [2020-10-11 12:55:35,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:35,130 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 612 transitions. [2020-10-11 12:55:35,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:35,131 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:35,131 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:35,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-10-11 12:55:35,332 INFO L429 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:35,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:35,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1355728142, now seen corresponding path program 285 times [2020-10-11 12:55:35,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:35,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236533210] [2020-10-11 12:55:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:35,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236533210] [2020-10-11 12:55:35,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391774466] [2020-10-11 12:55:35,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:35,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:55:35,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:55:35,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:35,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:42,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:42,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:42,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85344381] [2020-10-11 12:55:42,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:42,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:42,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:42,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=260, Unknown=2, NotChecked=0, Total=342 [2020-10-11 12:55:42,733 INFO L87 Difference]: Start difference. First operand 252 states and 612 transitions. Second operand 19 states. [2020-10-11 12:55:47,204 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-11 12:55:51,377 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-11 12:55:55,699 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-11 12:56:12,408 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-11 12:56:16,570 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 41 [2020-10-11 12:56:18,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:18,976 INFO L93 Difference]: Finished difference Result 330 states and 756 transitions. [2020-10-11 12:56:18,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:56:18,978 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:18,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:18,979 INFO L225 Difference]: With dead ends: 330 [2020-10-11 12:56:18,979 INFO L226 Difference]: Without dead ends: 326 [2020-10-11 12:56:18,979 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=353, Invalid=827, Unknown=10, NotChecked=0, Total=1190 [2020-10-11 12:56:18,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-11 12:56:18,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 246. [2020-10-11 12:56:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-11 12:56:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 600 transitions. [2020-10-11 12:56:18,982 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 600 transitions. Word has length 15 [2020-10-11 12:56:18,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:18,982 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 600 transitions. [2020-10-11 12:56:18,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:18,982 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 600 transitions. [2020-10-11 12:56:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:18,982 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:18,983 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:19,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-10-11 12:56:19,183 INFO L429 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:19,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:19,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1363216958, now seen corresponding path program 286 times [2020-10-11 12:56:19,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:19,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316473580] [2020-10-11 12:56:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:19,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316473580] [2020-10-11 12:56:19,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156532530] [2020-10-11 12:56:19,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:19,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:56:19,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:19,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:19,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:19,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:19,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:19,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692688198] [2020-10-11 12:56:19,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:19,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:19,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:19,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:19,912 INFO L87 Difference]: Start difference. First operand 246 states and 600 transitions. Second operand 19 states. [2020-10-11 12:56:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:20,482 INFO L93 Difference]: Finished difference Result 315 states and 727 transitions. [2020-10-11 12:56:20,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:56:20,484 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:20,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:20,485 INFO L225 Difference]: With dead ends: 315 [2020-10-11 12:56:20,485 INFO L226 Difference]: Without dead ends: 313 [2020-10-11 12:56:20,486 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:56:20,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-11 12:56:20,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 250. [2020-10-11 12:56:20,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-11 12:56:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 612 transitions. [2020-10-11 12:56:20,489 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 612 transitions. Word has length 15 [2020-10-11 12:56:20,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:20,489 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 612 transitions. [2020-10-11 12:56:20,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:20,489 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 612 transitions. [2020-10-11 12:56:20,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:20,489 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:20,490 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:20,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:20,690 INFO L429 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:20,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:20,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1363188128, now seen corresponding path program 287 times [2020-10-11 12:56:20,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:20,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720121271] [2020-10-11 12:56:20,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:20,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720121271] [2020-10-11 12:56:20,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651323147] [2020-10-11 12:56:20,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:21,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:56:21,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:21,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:21,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:23,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:23,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:23,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406578449] [2020-10-11 12:56:23,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:23,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:23,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:23,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:23,087 INFO L87 Difference]: Start difference. First operand 250 states and 612 transitions. Second operand 19 states. [2020-10-11 12:56:23,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:23,853 INFO L93 Difference]: Finished difference Result 335 states and 777 transitions. [2020-10-11 12:56:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:56:23,855 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:23,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:23,856 INFO L225 Difference]: With dead ends: 335 [2020-10-11 12:56:23,856 INFO L226 Difference]: Without dead ends: 332 [2020-10-11 12:56:23,857 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=235, Invalid=521, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:56:23,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-11 12:56:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 248. [2020-10-11 12:56:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-11 12:56:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 606 transitions. [2020-10-11 12:56:23,860 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 606 transitions. Word has length 15 [2020-10-11 12:56:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:23,860 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 606 transitions. [2020-10-11 12:56:23,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:23,860 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 606 transitions. [2020-10-11 12:56:23,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:23,861 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:23,861 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:24,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-10-11 12:56:24,062 INFO L429 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:24,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:24,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1362294398, now seen corresponding path program 288 times [2020-10-11 12:56:24,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:24,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157654616] [2020-10-11 12:56:24,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:24,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157654616] [2020-10-11 12:56:24,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110539235] [2020-10-11 12:56:24,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:24,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:56:24,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:24,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:24,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:24,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:24,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:24,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420344010] [2020-10-11 12:56:24,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:24,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:24,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:24,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:24,801 INFO L87 Difference]: Start difference. First operand 248 states and 606 transitions. Second operand 19 states. [2020-10-11 12:56:25,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:25,770 INFO L93 Difference]: Finished difference Result 327 states and 755 transitions. [2020-10-11 12:56:25,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:56:25,773 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:25,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:25,774 INFO L225 Difference]: With dead ends: 327 [2020-10-11 12:56:25,774 INFO L226 Difference]: Without dead ends: 325 [2020-10-11 12:56:25,774 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:56:25,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-11 12:56:25,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 250. [2020-10-11 12:56:25,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-11 12:56:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 612 transitions. [2020-10-11 12:56:25,777 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 612 transitions. Word has length 15 [2020-10-11 12:56:25,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:25,777 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 612 transitions. [2020-10-11 12:56:25,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 612 transitions. [2020-10-11 12:56:25,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:25,778 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:25,778 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:25,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-10-11 12:56:25,979 INFO L429 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:25,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:25,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1362293437, now seen corresponding path program 289 times [2020-10-11 12:56:25,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:25,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033423260] [2020-10-11 12:56:25,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:26,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033423260] [2020-10-11 12:56:26,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459832055] [2020-10-11 12:56:26,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:26,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:26,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:31,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:31,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:31,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73536623] [2020-10-11 12:56:31,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:31,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:31,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:31,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=261, Unknown=1, NotChecked=0, Total=342 [2020-10-11 12:56:31,981 INFO L87 Difference]: Start difference. First operand 250 states and 612 transitions. Second operand 19 states. [2020-10-11 12:56:37,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:37,198 INFO L93 Difference]: Finished difference Result 354 states and 818 transitions. [2020-10-11 12:56:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:56:37,200 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:37,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:37,201 INFO L225 Difference]: With dead ends: 354 [2020-10-11 12:56:37,201 INFO L226 Difference]: Without dead ends: 350 [2020-10-11 12:56:37,201 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=260, Invalid=607, Unknown=3, NotChecked=0, Total=870 [2020-10-11 12:56:37,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-11 12:56:37,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 250. [2020-10-11 12:56:37,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-11 12:56:37,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 612 transitions. [2020-10-11 12:56:37,205 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 612 transitions. Word has length 15 [2020-10-11 12:56:37,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:37,205 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 612 transitions. [2020-10-11 12:56:37,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:37,205 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 612 transitions. [2020-10-11 12:56:37,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:37,206 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:37,206 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:37,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:37,407 INFO L429 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:37,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:37,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1362264607, now seen corresponding path program 290 times [2020-10-11 12:56:37,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:37,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944295392] [2020-10-11 12:56:37,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:37,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944295392] [2020-10-11 12:56:37,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588453341] [2020-10-11 12:56:37,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:37,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:56:37,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:37,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:37,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:38,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:38,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:38,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917887135] [2020-10-11 12:56:38,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:38,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:38,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:38,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:38,220 INFO L87 Difference]: Start difference. First operand 250 states and 612 transitions. Second operand 19 states. [2020-10-11 12:56:39,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:39,277 INFO L93 Difference]: Finished difference Result 341 states and 791 transitions. [2020-10-11 12:56:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:56:39,280 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:39,281 INFO L225 Difference]: With dead ends: 341 [2020-10-11 12:56:39,281 INFO L226 Difference]: Without dead ends: 338 [2020-10-11 12:56:39,281 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:56:39,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-10-11 12:56:39,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 246. [2020-10-11 12:56:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-11 12:56:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 600 transitions. [2020-10-11 12:56:39,285 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 600 transitions. Word has length 15 [2020-10-11 12:56:39,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:39,285 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 600 transitions. [2020-10-11 12:56:39,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:39,285 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 600 transitions. [2020-10-11 12:56:39,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:39,286 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:39,286 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:39,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2020-10-11 12:56:39,486 INFO L429 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:39,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:39,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1334588768, now seen corresponding path program 291 times [2020-10-11 12:56:39,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:39,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970888093] [2020-10-11 12:56:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:39,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970888093] [2020-10-11 12:56:39,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45987334] [2020-10-11 12:56:39,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:39,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:56:39,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:39,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:39,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:40,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:40,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:40,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648294642] [2020-10-11 12:56:40,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:40,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:40,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:40,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:40,266 INFO L87 Difference]: Start difference. First operand 246 states and 600 transitions. Second operand 19 states. [2020-10-11 12:56:41,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:41,546 INFO L93 Difference]: Finished difference Result 314 states and 724 transitions. [2020-10-11 12:56:41,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 12:56:41,548 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:41,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:41,549 INFO L225 Difference]: With dead ends: 314 [2020-10-11 12:56:41,549 INFO L226 Difference]: Without dead ends: 312 [2020-10-11 12:56:41,549 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:56:41,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-11 12:56:41,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 249. [2020-10-11 12:56:41,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-11 12:56:41,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 609 transitions. [2020-10-11 12:56:41,552 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 609 transitions. Word has length 15 [2020-10-11 12:56:41,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:41,553 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 609 transitions. [2020-10-11 12:56:41,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:41,553 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 609 transitions. [2020-10-11 12:56:41,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:41,553 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:41,553 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:41,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:41,754 INFO L429 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:41,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:41,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1334587807, now seen corresponding path program 292 times [2020-10-11 12:56:41,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:41,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299873128] [2020-10-11 12:56:41,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:41,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299873128] [2020-10-11 12:56:41,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099275873] [2020-10-11 12:56:41,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:42,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:56:42,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:42,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:42,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:42,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:42,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:42,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138980539] [2020-10-11 12:56:42,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:42,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:42,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:42,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:42,552 INFO L87 Difference]: Start difference. First operand 249 states and 609 transitions. Second operand 19 states. [2020-10-11 12:56:43,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:43,760 INFO L93 Difference]: Finished difference Result 344 states and 794 transitions. [2020-10-11 12:56:43,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 12:56:43,763 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:43,763 INFO L225 Difference]: With dead ends: 344 [2020-10-11 12:56:43,763 INFO L226 Difference]: Without dead ends: 340 [2020-10-11 12:56:43,764 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:56:43,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-11 12:56:43,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 249. [2020-10-11 12:56:43,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-11 12:56:43,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 609 transitions. [2020-10-11 12:56:43,767 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 609 transitions. Word has length 15 [2020-10-11 12:56:43,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:43,767 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 609 transitions. [2020-10-11 12:56:43,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:43,767 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 609 transitions. [2020-10-11 12:56:43,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:43,767 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:43,767 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:43,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2020-10-11 12:56:43,968 INFO L429 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:43,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:43,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1334558977, now seen corresponding path program 293 times [2020-10-11 12:56:43,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:43,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846710000] [2020-10-11 12:56:43,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:44,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846710000] [2020-10-11 12:56:44,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233000522] [2020-10-11 12:56:44,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:44,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:56:44,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:44,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:44,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:54,006 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-11 12:56:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:57,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:57,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:57,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762517739] [2020-10-11 12:56:57,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:57,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:57,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:57,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=263, Unknown=2, NotChecked=0, Total=342 [2020-10-11 12:56:57,512 INFO L87 Difference]: Start difference. First operand 249 states and 609 transitions. Second operand 19 states. [2020-10-11 12:57:01,968 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:57:11,102 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-10-11 12:57:17,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:17,056 INFO L93 Difference]: Finished difference Result 353 states and 810 transitions. [2020-10-11 12:57:17,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 12:57:17,059 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:17,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:17,060 INFO L225 Difference]: With dead ends: 353 [2020-10-11 12:57:17,060 INFO L226 Difference]: Without dead ends: 349 [2020-10-11 12:57:17,060 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=280, Invalid=644, Unknown=6, NotChecked=0, Total=930 [2020-10-11 12:57:17,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-11 12:57:17,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 250. [2020-10-11 12:57:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-11 12:57:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 612 transitions. [2020-10-11 12:57:17,063 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 612 transitions. Word has length 15 [2020-10-11 12:57:17,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:17,063 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 612 transitions. [2020-10-11 12:57:17,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:17,064 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 612 transitions. [2020-10-11 12:57:17,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:17,064 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:17,064 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:17,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2020-10-11 12:57:17,265 INFO L429 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:17,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:17,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1333664286, now seen corresponding path program 294 times [2020-10-11 12:57:17,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:17,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223347542] [2020-10-11 12:57:17,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:17,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223347542] [2020-10-11 12:57:17,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138808937] [2020-10-11 12:57:17,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:17,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:57:17,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:17,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:17,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:19,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:19,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:19,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868638143] [2020-10-11 12:57:19,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:19,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:19,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:19,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:19,221 INFO L87 Difference]: Start difference. First operand 250 states and 612 transitions. Second operand 19 states. [2020-10-11 12:57:20,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:20,674 INFO L93 Difference]: Finished difference Result 352 states and 803 transitions. [2020-10-11 12:57:20,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:57:20,676 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:20,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:20,677 INFO L225 Difference]: With dead ends: 352 [2020-10-11 12:57:20,677 INFO L226 Difference]: Without dead ends: 336 [2020-10-11 12:57:20,678 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:57:20,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-11 12:57:20,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 244. [2020-10-11 12:57:20,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-11 12:57:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 592 transitions. [2020-10-11 12:57:20,681 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 592 transitions. Word has length 15 [2020-10-11 12:57:20,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:20,681 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 592 transitions. [2020-10-11 12:57:20,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:20,681 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 592 transitions. [2020-10-11 12:57:20,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:20,681 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:20,682 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:20,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2020-10-11 12:57:20,882 INFO L429 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:20,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:20,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1211028048, now seen corresponding path program 295 times [2020-10-11 12:57:20,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:20,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923525554] [2020-10-11 12:57:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:21,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923525554] [2020-10-11 12:57:21,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280615516] [2020-10-11 12:57:21,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:21,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:21,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:21,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:21,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:21,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563301486] [2020-10-11 12:57:21,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:21,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:21,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:21,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:21,648 INFO L87 Difference]: Start difference. First operand 244 states and 592 transitions. Second operand 19 states. [2020-10-11 12:57:22,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:22,317 INFO L93 Difference]: Finished difference Result 304 states and 700 transitions. [2020-10-11 12:57:22,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:57:22,320 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:22,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:22,321 INFO L225 Difference]: With dead ends: 304 [2020-10-11 12:57:22,321 INFO L226 Difference]: Without dead ends: 302 [2020-10-11 12:57:22,321 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:57:22,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-10-11 12:57:22,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 246. [2020-10-11 12:57:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-11 12:57:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 598 transitions. [2020-10-11 12:57:22,326 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 598 transitions. Word has length 15 [2020-10-11 12:57:22,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:22,326 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 598 transitions. [2020-10-11 12:57:22,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:22,326 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 598 transitions. [2020-10-11 12:57:22,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:22,326 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:22,326 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:22,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2020-10-11 12:57:22,527 INFO L429 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:22,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:22,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1211056878, now seen corresponding path program 296 times [2020-10-11 12:57:22,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:22,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788106477] [2020-10-11 12:57:22,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:22,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788106477] [2020-10-11 12:57:22,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425129144] [2020-10-11 12:57:22,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:22,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:57:22,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:22,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:22,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:23,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:23,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:23,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103569433] [2020-10-11 12:57:23,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:23,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:23,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:23,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:23,304 INFO L87 Difference]: Start difference. First operand 246 states and 598 transitions. Second operand 19 states. [2020-10-11 12:57:24,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:24,231 INFO L93 Difference]: Finished difference Result 321 states and 741 transitions. [2020-10-11 12:57:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:57:24,234 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:24,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:24,234 INFO L225 Difference]: With dead ends: 321 [2020-10-11 12:57:24,234 INFO L226 Difference]: Without dead ends: 318 [2020-10-11 12:57:24,235 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:57:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-11 12:57:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 244. [2020-10-11 12:57:24,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-11 12:57:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 592 transitions. [2020-10-11 12:57:24,238 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 592 transitions. Word has length 15 [2020-10-11 12:57:24,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:24,238 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 592 transitions. [2020-10-11 12:57:24,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:24,238 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 592 transitions. [2020-10-11 12:57:24,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:24,239 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:24,239 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:24,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:24,439 INFO L429 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:24,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:24,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1211950608, now seen corresponding path program 297 times [2020-10-11 12:57:24,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:24,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444911640] [2020-10-11 12:57:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:24,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444911640] [2020-10-11 12:57:24,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126953833] [2020-10-11 12:57:24,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:24,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:57:24,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:24,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:24,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:25,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:25,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:25,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908766149] [2020-10-11 12:57:25,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:25,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:25,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:25,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:25,206 INFO L87 Difference]: Start difference. First operand 244 states and 592 transitions. Second operand 19 states. [2020-10-11 12:57:26,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:26,340 INFO L93 Difference]: Finished difference Result 311 states and 716 transitions. [2020-10-11 12:57:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:57:26,342 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:26,343 INFO L225 Difference]: With dead ends: 311 [2020-10-11 12:57:26,343 INFO L226 Difference]: Without dead ends: 309 [2020-10-11 12:57:26,343 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:57:26,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-11 12:57:26,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 246. [2020-10-11 12:57:26,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-11 12:57:26,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 598 transitions. [2020-10-11 12:57:26,346 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 598 transitions. Word has length 15 [2020-10-11 12:57:26,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:26,347 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 598 transitions. [2020-10-11 12:57:26,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:26,347 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 598 transitions. [2020-10-11 12:57:26,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:26,347 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:26,347 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:26,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2020-10-11 12:57:26,548 INFO L429 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:26,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:26,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1211951569, now seen corresponding path program 298 times [2020-10-11 12:57:26,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:26,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636318877] [2020-10-11 12:57:26,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:26,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636318877] [2020-10-11 12:57:26,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438525100] [2020-10-11 12:57:26,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:26,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:57:26,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:26,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:26,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:29,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:29,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:29,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218085646] [2020-10-11 12:57:29,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:29,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:29,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:29,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=267, Unknown=1, NotChecked=0, Total=342 [2020-10-11 12:57:29,431 INFO L87 Difference]: Start difference. First operand 246 states and 598 transitions. Second operand 19 states. [2020-10-11 12:57:33,896 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-11 12:57:34,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:34,785 INFO L93 Difference]: Finished difference Result 335 states and 770 transitions. [2020-10-11 12:57:34,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 12:57:34,788 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:34,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:34,789 INFO L225 Difference]: With dead ends: 335 [2020-10-11 12:57:34,789 INFO L226 Difference]: Without dead ends: 331 [2020-10-11 12:57:34,790 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=272, Invalid=657, Unknown=1, NotChecked=0, Total=930 [2020-10-11 12:57:34,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-11 12:57:34,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 246. [2020-10-11 12:57:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-11 12:57:34,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 598 transitions. [2020-10-11 12:57:34,793 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 598 transitions. Word has length 15 [2020-10-11 12:57:34,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:34,793 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 598 transitions. [2020-10-11 12:57:34,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:34,794 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 598 transitions. [2020-10-11 12:57:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:34,794 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:34,794 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:34,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2020-10-11 12:57:34,995 INFO L429 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:34,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:34,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1211980399, now seen corresponding path program 299 times [2020-10-11 12:57:34,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:34,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206145328] [2020-10-11 12:57:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:35,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206145328] [2020-10-11 12:57:35,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044835401] [2020-10-11 12:57:35,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:35,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:57:35,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:35,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:35,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:37,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:37,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:37,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670263068] [2020-10-11 12:57:37,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:37,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:37,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:37,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:37,850 INFO L87 Difference]: Start difference. First operand 246 states and 598 transitions. Second operand 19 states. [2020-10-11 12:57:39,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:39,032 INFO L93 Difference]: Finished difference Result 321 states and 740 transitions. [2020-10-11 12:57:39,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 12:57:39,035 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:39,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:39,035 INFO L225 Difference]: With dead ends: 321 [2020-10-11 12:57:39,036 INFO L226 Difference]: Without dead ends: 318 [2020-10-11 12:57:39,036 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:57:39,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-11 12:57:39,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 242. [2020-10-11 12:57:39,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-11 12:57:39,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 586 transitions. [2020-10-11 12:57:39,039 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 586 transitions. Word has length 15 [2020-10-11 12:57:39,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:39,039 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 586 transitions. [2020-10-11 12:57:39,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:39,039 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 586 transitions. [2020-10-11 12:57:39,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:39,040 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:39,040 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:39,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:39,241 INFO L429 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:39,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1848257538, now seen corresponding path program 300 times [2020-10-11 12:57:39,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:39,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631470482] [2020-10-11 12:57:39,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:39,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631470482] [2020-10-11 12:57:39,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946201019] [2020-10-11 12:57:39,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:39,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:57:39,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:39,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:39,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:39,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:39,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:39,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188958819] [2020-10-11 12:57:39,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:39,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:39,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:39,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:39,972 INFO L87 Difference]: Start difference. First operand 242 states and 586 transitions. Second operand 19 states. [2020-10-11 12:57:40,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:40,735 INFO L93 Difference]: Finished difference Result 293 states and 675 transitions. [2020-10-11 12:57:40,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:57:40,738 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:40,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:40,739 INFO L225 Difference]: With dead ends: 293 [2020-10-11 12:57:40,739 INFO L226 Difference]: Without dead ends: 291 [2020-10-11 12:57:40,739 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=228, Invalid=528, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:57:40,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-11 12:57:40,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 242. [2020-10-11 12:57:40,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-11 12:57:40,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 586 transitions. [2020-10-11 12:57:40,742 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 586 transitions. Word has length 15 [2020-10-11 12:57:40,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:40,742 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 586 transitions. [2020-10-11 12:57:40,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:40,742 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 586 transitions. [2020-10-11 12:57:40,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:40,743 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:40,743 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:40,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:40,943 INFO L429 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:40,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:40,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1848286368, now seen corresponding path program 301 times [2020-10-11 12:57:40,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:40,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199536088] [2020-10-11 12:57:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:41,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199536088] [2020-10-11 12:57:41,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539449222] [2020-10-11 12:57:41,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:41,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:41,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:44,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:44,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:44,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466779015] [2020-10-11 12:57:44,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:44,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:44,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:44,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:44,748 INFO L87 Difference]: Start difference. First operand 242 states and 586 transitions. Second operand 19 states. [2020-10-11 12:57:45,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:45,747 INFO L93 Difference]: Finished difference Result 306 states and 707 transitions. [2020-10-11 12:57:45,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:57:45,750 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:45,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:45,751 INFO L225 Difference]: With dead ends: 306 [2020-10-11 12:57:45,751 INFO L226 Difference]: Without dead ends: 303 [2020-10-11 12:57:45,751 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=263, Invalid=607, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:57:45,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-11 12:57:45,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 240. [2020-10-11 12:57:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-11 12:57:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 580 transitions. [2020-10-11 12:57:45,754 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 580 transitions. Word has length 15 [2020-10-11 12:57:45,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:45,754 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 580 transitions. [2020-10-11 12:57:45,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:45,754 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 580 transitions. [2020-10-11 12:57:45,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:45,755 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:45,755 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:45,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:45,956 INFO L429 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:45,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:45,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1868813328, now seen corresponding path program 302 times [2020-10-11 12:57:45,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:45,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720141892] [2020-10-11 12:57:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:46,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720141892] [2020-10-11 12:57:46,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821645984] [2020-10-11 12:57:46,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:46,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:57:46,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:46,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:46,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:46,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:46,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:46,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869440582] [2020-10-11 12:57:46,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:46,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:46,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:46,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:46,665 INFO L87 Difference]: Start difference. First operand 240 states and 580 transitions. Second operand 19 states. [2020-10-11 12:57:47,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:47,502 INFO L93 Difference]: Finished difference Result 281 states and 652 transitions. [2020-10-11 12:57:47,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:57:47,505 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:47,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:47,506 INFO L225 Difference]: With dead ends: 281 [2020-10-11 12:57:47,506 INFO L226 Difference]: Without dead ends: 279 [2020-10-11 12:57:47,506 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=252, Invalid=560, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:57:47,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-11 12:57:47,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 236. [2020-10-11 12:57:47,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-11 12:57:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 574 transitions. [2020-10-11 12:57:47,509 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 574 transitions. Word has length 15 [2020-10-11 12:57:47,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:47,509 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 574 transitions. [2020-10-11 12:57:47,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:47,509 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 574 transitions. [2020-10-11 12:57:47,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:47,510 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:47,510 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:47,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2020-10-11 12:57:47,711 INFO L429 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:47,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:47,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1869505248, now seen corresponding path program 303 times [2020-10-11 12:57:47,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:47,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612174181] [2020-10-11 12:57:47,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:47,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612174181] [2020-10-11 12:57:47,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983324812] [2020-10-11 12:57:47,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:47,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:57:47,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:47,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:47,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:48,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:48,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:48,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277222584] [2020-10-11 12:57:48,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:48,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:48,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:48,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:48,446 INFO L87 Difference]: Start difference. First operand 236 states and 574 transitions. Second operand 19 states. [2020-10-11 12:57:49,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:49,392 INFO L93 Difference]: Finished difference Result 286 states and 682 transitions. [2020-10-11 12:57:49,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:57:49,395 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:49,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:49,396 INFO L225 Difference]: With dead ends: 286 [2020-10-11 12:57:49,396 INFO L226 Difference]: Without dead ends: 284 [2020-10-11 12:57:49,396 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=273, Invalid=597, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:57:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-11 12:57:49,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 238. [2020-10-11 12:57:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-11 12:57:49,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 579 transitions. [2020-10-11 12:57:49,403 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 579 transitions. Word has length 15 [2020-10-11 12:57:49,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:49,403 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 579 transitions. [2020-10-11 12:57:49,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:49,403 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 579 transitions. [2020-10-11 12:57:49,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:49,403 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:49,404 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:49,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2020-10-11 12:57:49,604 INFO L429 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:49,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1869527568, now seen corresponding path program 304 times [2020-10-11 12:57:49,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:49,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231848210] [2020-10-11 12:57:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:49,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231848210] [2020-10-11 12:57:49,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653599215] [2020-10-11 12:57:49,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:49,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:57:49,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:49,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:49,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:50,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:57:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:50,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:50,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:50,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705692281] [2020-10-11 12:57:50,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:50,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:50,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:50,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:50,305 INFO L87 Difference]: Start difference. First operand 238 states and 579 transitions. Second operand 19 states. [2020-10-11 12:57:51,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:51,491 INFO L93 Difference]: Finished difference Result 309 states and 740 transitions. [2020-10-11 12:57:51,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:57:51,494 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:51,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:51,495 INFO L225 Difference]: With dead ends: 309 [2020-10-11 12:57:51,495 INFO L226 Difference]: Without dead ends: 305 [2020-10-11 12:57:51,495 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:57:51,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-11 12:57:51,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 238. [2020-10-11 12:57:51,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-11 12:57:51,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 580 transitions. [2020-10-11 12:57:51,499 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 580 transitions. Word has length 15 [2020-10-11 12:57:51,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:51,499 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 580 transitions. [2020-10-11 12:57:51,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:51,499 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 580 transitions. [2020-10-11 12:57:51,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:51,499 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:51,499 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:51,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2020-10-11 12:57:51,700 INFO L429 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:51,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:51,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1869735888, now seen corresponding path program 305 times [2020-10-11 12:57:51,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:51,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372379767] [2020-10-11 12:57:51,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:51,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372379767] [2020-10-11 12:57:51,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603632902] [2020-10-11 12:57:51,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:51,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:57:51,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:51,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:51,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:54,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:54,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:54,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188199094] [2020-10-11 12:57:54,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:54,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:54,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:54,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:54,488 INFO L87 Difference]: Start difference. First operand 238 states and 580 transitions. Second operand 19 states. [2020-10-11 12:57:55,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:55,626 INFO L93 Difference]: Finished difference Result 328 states and 772 transitions. [2020-10-11 12:57:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:57:55,629 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:55,630 INFO L225 Difference]: With dead ends: 328 [2020-10-11 12:57:55,630 INFO L226 Difference]: Without dead ends: 325 [2020-10-11 12:57:55,630 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=263, Invalid=667, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:57:55,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-11 12:57:55,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 240. [2020-10-11 12:57:55,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-11 12:57:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 586 transitions. [2020-10-11 12:57:55,633 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 586 transitions. Word has length 15 [2020-10-11 12:57:55,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:55,634 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 586 transitions. [2020-10-11 12:57:55,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 586 transitions. [2020-10-11 12:57:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:55,634 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:55,634 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:55,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2020-10-11 12:57:55,835 INFO L429 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:55,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1870398978, now seen corresponding path program 306 times [2020-10-11 12:57:55,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:55,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026269862] [2020-10-11 12:57:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:56,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026269862] [2020-10-11 12:57:56,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968063285] [2020-10-11 12:57:56,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:56,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:57:56,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:56,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:56,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:56,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:56,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:56,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373565087] [2020-10-11 12:57:56,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:56,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:56,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:56,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:56,659 INFO L87 Difference]: Start difference. First operand 240 states and 586 transitions. Second operand 19 states. [2020-10-11 12:57:58,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:58,126 INFO L93 Difference]: Finished difference Result 343 states and 820 transitions. [2020-10-11 12:57:58,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 12:57:58,129 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:58,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:58,129 INFO L225 Difference]: With dead ends: 343 [2020-10-11 12:57:58,130 INFO L226 Difference]: Without dead ends: 340 [2020-10-11 12:57:58,130 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:57:58,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-11 12:57:58,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 244. [2020-10-11 12:57:58,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-11 12:57:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 598 transitions. [2020-10-11 12:57:58,134 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 598 transitions. Word has length 15 [2020-10-11 12:57:58,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:58,134 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 598 transitions. [2020-10-11 12:57:58,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 598 transitions. [2020-10-11 12:57:58,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:58,134 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:58,134 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:58,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable334,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:58,335 INFO L429 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:58,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:58,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1870421298, now seen corresponding path program 307 times [2020-10-11 12:57:58,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:58,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354591939] [2020-10-11 12:57:58,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:58,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354591939] [2020-10-11 12:57:58,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77504343] [2020-10-11 12:57:58,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:58,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:58,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:58:01,084 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:58:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:01,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:58:01,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:58:01,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620969939] [2020-10-11 12:58:01,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:58:01,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:58:01,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:58:01,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=234, Unknown=1, NotChecked=0, Total=342 [2020-10-11 12:58:01,149 INFO L87 Difference]: Start difference. First operand 244 states and 598 transitions. Second operand 19 states. [2020-10-11 12:58:05,685 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:58:10,094 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-11 12:58:11,402 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-11 12:58:11,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:58:11,443 INFO L93 Difference]: Finished difference Result 384 states and 919 transitions. [2020-10-11 12:58:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:58:11,446 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:58:11,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:58:11,447 INFO L225 Difference]: With dead ends: 384 [2020-10-11 12:58:11,447 INFO L226 Difference]: Without dead ends: 375 [2020-10-11 12:58:11,447 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=408, Invalid=923, Unknown=1, NotChecked=0, Total=1332 [2020-10-11 12:58:11,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-11 12:58:11,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 241. [2020-10-11 12:58:11,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-11 12:58:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 594 transitions. [2020-10-11 12:58:11,450 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 594 transitions. Word has length 15 [2020-10-11 12:58:11,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:58:11,450 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 594 transitions. [2020-10-11 12:58:11,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:58:11,451 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 594 transitions. [2020-10-11 12:58:11,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:58:11,451 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:58:11,451 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:58:11,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2020-10-11 12:58:11,652 INFO L429 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:58:11,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:58:11,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1870450128, now seen corresponding path program 308 times [2020-10-11 12:58:11,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:58:11,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676729899] [2020-10-11 12:58:11,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:58:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:11,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676729899] [2020-10-11 12:58:11,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613277242] [2020-10-11 12:58:11,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:58:12,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:58:12,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:58:12,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:58:12,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:58:12,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:58:12,544 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:58:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:14,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:58:14,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-10-11 12:58:14,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290946058] [2020-10-11 12:58:14,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 12:58:14,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:58:14,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 12:58:14,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=269, Unknown=1, NotChecked=0, Total=380 [2020-10-11 12:58:14,717 INFO L87 Difference]: Start difference. First operand 241 states and 594 transitions. Second operand 20 states. [2020-10-11 12:58:15,500 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2020-10-11 12:58:17,942 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 46 [2020-10-11 12:58:26,214 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 53 [2020-10-11 12:58:41,014 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-11 12:58:57,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:58:57,294 INFO L93 Difference]: Finished difference Result 365 states and 874 transitions. [2020-10-11 12:58:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 12:58:57,298 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-10-11 12:58:57,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:58:57,299 INFO L225 Difference]: With dead ends: 365 [2020-10-11 12:58:57,299 INFO L226 Difference]: Without dead ends: 360 [2020-10-11 12:58:57,299 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=449, Invalid=1027, Unknown=6, NotChecked=0, Total=1482 [2020-10-11 12:58:57,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-11 12:58:57,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 241. [2020-10-11 12:58:57,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-11 12:58:57,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 593 transitions. [2020-10-11 12:58:57,303 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 593 transitions. Word has length 15 [2020-10-11 12:58:57,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:58:57,303 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 593 transitions. [2020-10-11 12:58:57,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 12:58:57,303 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 593 transitions. [2020-10-11 12:58:57,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:58:57,304 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:58:57,304 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:58:57,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:58:57,505 INFO L429 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:58:57,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:58:57,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1876885728, now seen corresponding path program 309 times [2020-10-11 12:58:57,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:58:57,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971699495] [2020-10-11 12:58:57,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:58:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:57,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971699495] [2020-10-11 12:58:57,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548278353] [2020-10-11 12:58:57,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:58:57,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:58:57,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:58:57,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:58:57,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:58:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:58,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:58:58,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:58:58,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518266365] [2020-10-11 12:58:58,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:58:58,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:58:58,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:58:58,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:58:58,324 INFO L87 Difference]: Start difference. First operand 241 states and 593 transitions. Second operand 19 states. [2020-10-11 12:58:59,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:58:59,523 INFO L93 Difference]: Finished difference Result 333 states and 783 transitions. [2020-10-11 12:58:59,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:58:59,526 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:58:59,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:58:59,526 INFO L225 Difference]: With dead ends: 333 [2020-10-11 12:58:59,527 INFO L226 Difference]: Without dead ends: 331 [2020-10-11 12:58:59,527 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=250, Invalid=680, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:58:59,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-11 12:58:59,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 244. [2020-10-11 12:58:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-11 12:58:59,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 603 transitions. [2020-10-11 12:58:59,531 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 603 transitions. Word has length 15 [2020-10-11 12:58:59,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:58:59,531 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 603 transitions. [2020-10-11 12:58:59,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:58:59,531 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 603 transitions. [2020-10-11 12:58:59,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:58:59,532 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:58:59,532 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:58:59,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2020-10-11 12:58:59,733 INFO L429 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:58:59,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:58:59,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1876886689, now seen corresponding path program 310 times [2020-10-11 12:58:59,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:58:59,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405030187] [2020-10-11 12:58:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:58:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:59,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405030187] [2020-10-11 12:58:59,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212095436] [2020-10-11 12:58:59,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:59:00,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:59:00,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:59:00,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:59:00,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:59:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:59:02,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:59:02,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:59:02,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418046211] [2020-10-11 12:59:02,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:59:02,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:59:02,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:59:02,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=269, Unknown=1, NotChecked=0, Total=342 [2020-10-11 12:59:02,697 INFO L87 Difference]: Start difference. First operand 244 states and 603 transitions. Second operand 19 states. Received shutdown request... [2020-10-11 12:59:05,262 WARN L210 SmtUtils]: Removed 6 from assertion stack [2020-10-11 12:59:05,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:59:05,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2020-10-11 12:59:05,463 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-11 12:59:05,468 WARN L235 ceAbstractionStarter]: Timeout [2020-10-11 12:59:05,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:59:05 BasicIcfg [2020-10-11 12:59:05,468 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 12:59:05,470 INFO L168 Benchmark]: Toolchain (without parser) took 885141.79 ms. Allocated memory was 253.2 MB in the beginning and 230.2 MB in the end (delta: -23.1 MB). Free memory was 208.4 MB in the beginning and 158.5 MB in the end (delta: 49.9 MB). Peak memory consumption was 26.8 MB. Max. memory is 14.2 GB. [2020-10-11 12:59:05,470 INFO L168 Benchmark]: CDTParser took 1.29 ms. Allocated memory is still 253.2 MB. Free memory was 231.3 MB in the beginning and 230.4 MB in the end (delta: 839.2 kB). Peak memory consumption was 839.2 kB. Max. memory is 14.2 GB. [2020-10-11 12:59:05,471 INFO L168 Benchmark]: CACSL2BoogieTranslator took 708.18 ms. Allocated memory was 253.2 MB in the beginning and 318.2 MB in the end (delta: 65.0 MB). Free memory was 208.4 MB in the beginning and 272.5 MB in the end (delta: -64.1 MB). Peak memory consumption was 26.7 MB. Max. memory is 14.2 GB. [2020-10-11 12:59:05,471 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.84 ms. Allocated memory is still 318.2 MB. Free memory was 272.5 MB in the beginning and 270.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 12:59:05,471 INFO L168 Benchmark]: Boogie Preprocessor took 24.35 ms. Allocated memory is still 318.2 MB. Free memory was 270.0 MB in the beginning and 268.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. [2020-10-11 12:59:05,471 INFO L168 Benchmark]: RCFGBuilder took 478.31 ms. Allocated memory is still 318.2 MB. Free memory was 268.3 MB in the beginning and 247.2 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 14.2 GB. [2020-10-11 12:59:05,471 INFO L168 Benchmark]: TraceAbstraction took 883877.32 ms. Allocated memory was 318.2 MB in the beginning and 230.2 MB in the end (delta: -88.1 MB). Free memory was 247.2 MB in the beginning and 158.5 MB in the end (delta: 88.7 MB). Peak memory consumption was 602.6 kB. Max. memory is 14.2 GB. [2020-10-11 12:59:05,473 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.29 ms. Allocated memory is still 253.2 MB. Free memory was 231.3 MB in the beginning and 230.4 MB in the end (delta: 839.2 kB). Peak memory consumption was 839.2 kB. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 708.18 ms. Allocated memory was 253.2 MB in the beginning and 318.2 MB in the end (delta: 65.0 MB). Free memory was 208.4 MB in the beginning and 272.5 MB in the end (delta: -64.1 MB). Peak memory consumption was 26.7 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 43.84 ms. Allocated memory is still 318.2 MB. Free memory was 272.5 MB in the beginning and 270.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 24.35 ms. Allocated memory is still 318.2 MB. Free memory was 270.0 MB in the beginning and 268.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. * RCFGBuilder took 478.31 ms. Allocated memory is still 318.2 MB. Free memory was 268.3 MB in the beginning and 247.2 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 14.2 GB. * TraceAbstraction took 883877.32 ms. Allocated memory was 318.2 MB in the beginning and 230.2 MB in the end (delta: -88.1 MB). Free memory was 247.2 MB in the beginning and 158.5 MB in the end (delta: 88.7 MB). Peak memory consumption was 602.6 kB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 697 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 12 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.1s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 50 TotalNumberOfCompositions, 943 MoverChecksTotal - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (244states) and FLOYD_HOARE automaton (currently 9 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 42 for 2026ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 883.7s, OverallIterations: 339, TraceHistogramMax: 6, AutomataDifference: 545.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.1s, HoareTripleCheckerStatistics: 4642 SDtfs, 37033 SDslu, 34614 SDs, 0 SdLazy, 25476 SolverSat, 11498 SolverUnsat, 42 SolverUnknown, 0 SolverNotchecked, 117.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10227 GetRequests, 1667 SyntacticMatches, 313 SemanticMatches, 8246 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 57256 ImplicationChecksByTransitivity, 648.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=282occurred in iteration=215, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 338 MinimizatonAttempts, 22862 StatesRemovedByMinimization, 337 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.9s SsaConstructionTime, 4.8s SatisfiabilityAnalysisTime, 251.5s InterpolantComputationTime, 8992 NumberOfCodeBlocks, 8990 NumberOfCodeBlocksAsserted, 1077 NumberOfCheckSat, 8322 ConstructedInterpolants, 66 QuantifiedInterpolants, 991113 SizeOfPredicates, 329 NumberOfNonLiveVariables, 30221 ConjunctsInSsa, 3508 ConjunctsInUnsatCore, 670 InterpolantComputations, 10 PerfectInterpolantSequences, 30/4266 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown